I also informally thought about whether practically general AI that falls into the category “consequentialist / expected utility maximizer / approximation to AIXI” could ever work. And I am not convinced.
Too bad. I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power. Strangely, doing so will not make it conform to your ideas about “eventual future AGI”, because this one is actually existing AGI, and reality doesn’t have to listen to you.
If general AI, which is capable of a hard-takeoff, and able to take over the world, requires less lines of code, in order to work, than to constrain it not to take over the world, then that’s an existential risk.
That is exactly the situation we face, your refusal to believe in actually-existing AGI models notwithstanding. Whine all you please: the math will keep on working.
Since I am not a programmer, or computer scientist,
Then I recommend you shut up about matters of highly involved computer science until such time as you have acquired the relevant knowledge for yourself. I am a trained computer scientist, and I held lots of skepticism about MIRI’s claims, so I used my training and education to actually check them. And I found that the actual evidence of the AGI research record showed MIRI’s claims to be basically correct, modulo Eliezer’s claims about an intelligence explosion taking place versus Hutter’s claim that an eventual optimal agent will simply scale itself up in intelligence with the amount of computing power it can obtain.
That’s right, not everyone here is some kind of brainwashed cultist. Many of us have exercised basic skepticism against claims with extremely low subjective priors. But we exercised our skepticism by doing the background research and checking the presently available object-level evidence rather than by engaging in meta-level speculations about an imagined future in which everything will just work out.
Take a course at your local technical college, or go on a MOOC, or just dust off a whole bunch of textbooks in computer-scientific and mathematical subjects, study the necessary knowledge to talk about AGI, and then you get to barge in telling everyone around you how we’re all full of crap.
Too bad. I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power.
Which one are you talking about, to be completely exact?
I am a trained computer scientist
then use that training and figure out how many galaxies worth of computing power it’s going to take.
Of bleeding course I was talking about AIXI. What I find strange to the point of suspiciousness here is the evinced belief on part of the “AI skeptics” that the inefficiency of MC-AIXI means there will never, ever be any such thing as near-human, human-equivalent, or greater-than-human AGIs. After all, if intelligence is impossible without converting whole galaxies to computronium first, then how do we work?
And if we admit that sub-galactic intelligence is possible, why not artificial intelligence? And if we admit that sub-galactic artificial intelligence is possible, why not something from the “Machine Learning for Highly General Hypothesis Classes + Decision Theory of Active Environments = Universal AI” paradigm started by AIXI?
I’m not at all claiming current implementations of AIXI or Goedel Machines are going to cleanly evolve into planet-dominating superintelligences that run on a home PC next year, or even next decade (for one thing, I don’t think planet dominating superintelligences will run on a present-day home PC ever). I am claiming that the underlying scientific paradigm of the thing is a functioning reduction of what we mean by the word “intelligence”, and given enough time to work, this scientific paradigm is very probably (in my view) going to produce software you can run on an ordinary massive server farm that will be able to optimize arbitrary, unknown or partially unknown environments according to specified utility functions.
And eventually, yes, those agents will become smarter than us (causing “MIRI’s issues” to become cogent), because we, actual human beings, will figure out the relationships between compute-power, learning efficiency (rates of convergence to error-minimizing hypotheses in terms of training data), reasoning efficiency (moving probability information from one proposition or node in a hypothesis to another via updating), and decision-making efficiency (compute-power needed to plan well given models of the environment). Actual researchers will figure out the fuel efficiency of artificial intelligence, and thus be able to design at least one gigantic server cluster running at least one massive utility-maximizing algorithm that will be able to reason better and faster than a human (while they have the budget to keep it running).
The notion that AI is possible is mainstream. The crank stuff such as “I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power.”, that’s to computer science as hydrinos are to physics.
As for your server farm optimizing unknown environments, the last time I checked, we knew some laws of physics, and did things like making software tools that optimize simulated environments that follow said laws of physics, incidentally it also being mathematically nonsensical to define an “utility function” without a well defined domain. So you got your academic curiosity that’s doing all on it’s own and using some very general and impractical representations for modelling the world, so what? You’re talking of something that is less—in terms of it’s market value, power, anything—than it’s parts and underlying technologies.
incidentally it also being mathematically nonsensical to define an “utility function” without a well defined domain
Which is why reinforcement learning is so popular, yes: it lets you induce a utility function over any environment you’re capable of learning to navigate.
Remember, any machine-learning algorithm has a defined domain of hypotheses it can learn/search within. Given that domain of hypotheses, you can define what a domain of utility functions. Hence, reinforcement learning and preference learning.
The notion that AI is possible is mainstream. The crank stuff such as “I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power.”, that’s to computer science as hydrinos are to physics.
You are completely missing the point. If we’re all going to agree that AI is possible, and agree that there’s a completely crappy but genuinely existent example of AGI right now, then it follows that getting AI up to dangerous and/or beneficial levels is a matter of additional engineering progress. My whole point is that we’ve already crossed the equivalent threshold from “Hey, why do photons do that when I fire them at that plate?” to “Oh, there’s a photoelectric effect that looks to be described well by this fancy new theory.” From there it was less than one century between the raw discovery of quantum mechanics and the common usage of everyday technologies based on quantum mechanics.
So you got your academic curiosity that’s doing all on it’s own and using some very general and impractical representations for modelling the world, so what?
The point being: when we can manage to make it sufficiently efficient, and provided we can make it safe, we can set it to work solving just about any problem we consider to be, well, a problem. Given sufficient power and efficiency, it becomes useful for doing stuff people want done, especially stuff people either don’t want to do themselves or have a very hard time doing themselves.
completely crappy but genuinely existent example of AGI, then it follows that getting AI up to dangerous and/or beneficial levels is a matter of additional engineering progress.
Yeah. I can write formally the resurrection of everyone who ever died. Using pretty much exact same approach. A for loop, iterating over every possible ‘brain’ just like the loops that iterate over every action sequence. Because when you have no clue how to do something, you can always write a for loop. I can put it on github, then cranks can download it and say that resurrecting all dead is a matter of additional engineering progress. After all, all dead had once lived, so it got to be possible for them to be alive.
Describing X as “Y, together with the difference between X and Y” is a tautology. Drawing the conclusion that X is “really” a sort of Y already, and the difference is “just” a matter of engineering development is no more than inspirational fluff. Dividing problems into subproblems is all very well, but not when one of the subproblems amounts to the whole problem.
The particular instance “here’s a completely crappy attempt at making an AGI and all we have to do is scale it up” has been a repeated theme of AGI research from the beginning. The scaling up has never happened. There is no such thing as a “completely crappy AGI”, only things that aren’t AGI.
I think you underestimate the significance of reducing the AGI problem to the sequence prediction problem. Unlike the former, the latter problem is very well defined, and progress is easily measurable and quantifiable (in terms of efficiency of cross-domain compression). The likelyhood of engineering progress on a problem where success can be quantified seems significantly higher than on something as open ended as “general intelligence”.
It doesn’t “reduce” anything, not in reductionism sense anyway. If you are to take that formula and apply the yet unspecified ultra powerful mathematics package to it—that’s what you need to run it on planet worth of computers—it’s this mathematics package that has to be extremely intelligent and ridiculously superhuman, before the resulting AI is even a chimp. It’s this mathematics package that has to learn tricks and read books, that has to be able to do something as simple as making use of a theorem it encountered on input.
The mathematics package doesn’t have to do anything “clever” to build a highly clever sequence predictor. It just has to be efficient in terms of computing time and training data necessary to learn correct hypotheses.
So nshepperd is quite correct: MC-AIXI is a ridiculously inefficient sequence predictor and action selector, with major visible flaws, but reducing “general intelligence” to “maximizing a utility function over world-states via sequence prediction in an active environment” is a Big Deal.
Multitude of AIs have been following what you think “AIXI” model is—select predictors that work, use them—long before anyone bothered to formulate it as a brute force loop (AIXI).
I think you, like most people over here, have a completely inverted view with regards to the difficulty of different breakthroughs. There is a point where the AI uses hierarchical models to deal with environment of greater complexity than the AI itself; getting there is fundamentally difficult, as in, we have no clue how to get there.
It is nice to believe that the word of some hoi polloi is waiting on you for some conceptual breakthrough just roughly within your reach like AIXI is, but that’s just not how it works.
edit: Basically, it’s as if you’re concerned about nuclear powered 20 feet tall robots that shoot nuclear hand grenades. After all, the concept of 20 feet tall robot is the enormous breakthrough, while a sufficiently small nuclear reactor or hand grenade sized nukes are just a matter of “efficiency”.
That’s not what’s interesting about AIXI. “Select predictors that work, then use them” is a fair description of the entire field of machine learning; we’ve learned how to do that fairly well in narrow, well-defined problem domains, but hypothesis generation over poorly structured, arbitrarily complex environments is vastly harder.
The AIXI model is cool because it defines a clever (if totally impractical, and not without pitfalls) way of specifying a single algorithm that can generalize to arbitrary environments without requiring any pipe-fitting work on the part of its developers. That is (to my knowledge) new, and fairly impressive, though it remains a purely theoretical advance: the Monte Carlo approximation eli mentioned may qualify as general AI in some technical sense, but for practical purposes it’s about as smart as throwing transistors at a dart board.
but hypothesis generation over poorly structured, arbitrarily complex environments is vastly harder.
Hypothesis generation over environments that aren’t massively less complex than the machine is vastly harder, and remains vastly harder (albeit there are advances). There’s a subtle problem substitution occurring which steals the thunder you originally reserved for something that actually is vastly harder.
Thing is, many people could at any time write a loop over, say, possible neural network values, and NNs (with feedback) being Turing complete, it’d work roughly the same. Said for loop would be massively, massively less complicated, ingenious, and creative than what those people actually did with their time instead.
The ridiculousness here is that, say, John worked on those ingenious algorithms while keeping in mind that the ideal is the best parameters out of the whole space (which is the abstract concept behind the for loop iteration over those parameters). You couldn’t see what John was doing because he didn’t write it out as a for loop. So James does some work where he—unlike John—has to write out the for loop explicitly, and you go Whoah!
That is (to my knowledge) new
Isn’t. See Solomonoff induction, works of Kolmogorov, etc.
Which is why reinforcement learning is so popular, yes
There’s the AIs that solve novel problems along the lines of “design a better airplane wing” or “route a microchip”, and in that field, reinforcement learning of how basic physics works is pretty much one hundred percent irrelevant.
You are completely missing the point. If we’re all going to agree that AI is possible, and agree that there’s a completely crappy but genuinely existent example of AGI right now, then it follows that getting AI up to dangerous and/or beneficial levels is a matter of additional engineering progress
Slow, long term progress, an entire succession of technologies.
Really, you’re just like free energy pseudoscientists. They do all the same things. Ohh, you don’t want to give money for cold fusion? You must be a global warming denialist. That’s the way they think and that’s precisely the way you think about the issue. That you can make literally cold fusion happen with muons in no way shape or form supports what the cold fusion crackpots are doing. Nor does it make cold fusion power plants any more or less a matter of “additional engineering progress” than it would be otherwise.
edit: by same logic, resurrection of the long-dead never-preserved is merely a matter of “additional engineering progress”. Because you can resurrect the dead using this exact same programming construct that AIXI uses to solve problems. It’s called a “for loop”, there’s this for loop in monte carlo aixi. This loop goes over every possible [thing] when you have no clue what so ever how to actually produce [thing] . Thing = action sequence for AIXI and the brain data for resurrection of the dead.
Slow, long term progress, an entire succession of technologies.
Ok, hold on, halt, major question: how closely do you follow the field of machine learning? And computational cognitive science?
Because on the one hand, there is very significant progress being made. On the other hand, when I say “additional engineering progress”, that involves anywhere from years to decades of work before being able to make an agent that can compose an essay, due to the fact that we need classes of learners capable of inducing fairly precise hypotheses over large spaces of possible programs.
What it doesn’t involve is solving intractable, magical-seeming philosophical problems like the nature of “intelligence” or “consciousness” that have always held the field of AI back.
edit: by same logic, resurrection of the long-dead never-preserved is merely a matter of “additional engineering progress”.
No, that’s just plain impossible. Even in the case of cryonic so-called “preservation”, we don’t know what we don’t know about what information we will have needed preserved to restore someone.
Ok, hold on, halt, major question: how closely do you follow the field of machine learning? And computational cognitive science?
(makes the gesture with the hands) Thiiiiis closely. Seriously though, not far enough as to start claiming that mc-AIXI does something interesting when run on a server with root access, or to claim that it would be superhuman if run on all computers we got, or the like.
No, that’s just plain impossible.
Do I need to write code for that and put it on github? Iterates over every possible brain (represented as, say, a Turing machine), runs it for enough timesteps. Requires too much computing power.
Tell me, if I signed up as the PhD student of one among certain major general machine learning researchers, and built out their ideas into agent models, and got one of those running on a server cluster showing interesting proto-human behaviors, might it interest you?
You are completely missing the point. If we’re all going to agree that AI is possible, and agree that there’s a completely crappy but genuinely existent example of AGI right now, then it follows that getting AI up to dangerous and/or beneficial levels is a matter of additional engineering progress
Progress in 1. The sense of incrementally throwing more resources at AIXI, or 2. Forgetting AIXI , and coming up with something more parsimonious?
Because, if it’s 2, there is no other AGI to use as a stating point got incremental progress.
Too bad. I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power.
I think you are underestimating this by many orders of magnitudes.
Yeah. A starting point could be the AI writing some 1000 letter essay (action space of 27^1000 without punctuation) or talking through a sound card (action space of 2^(16*44100) per second). If he was talking about mc-AIXI on github, the relevant bits seem to be in the agent.cpp and it ain’t looking good.
Too bad. I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power.
We won’t get a chance to test the “planet’s worth of computing power” hypothesis directly, since none of us have access to that much computing power. But, from my own experience implementing mc-aixi-ctw, I suspect that is an underestimate of the amount of compute power required.
The main problem is that the sequence prediction algorithm (CTW) makes inefficient use of sense data by “prioritizing” the most recent bits of the observation string, so only weakly makes connections between bits that are temporally separated by a lot of noise. Secondarily, plain monte carlo tree search is not well-suited to decision making in huge action spaces, because it wants to think about each action at least once. But that can most likely be addressed by reusing sequence prediction to reduce the “size” of the action space by chunking actions into functional units.
Unfortunately. both of these problems are only really technical ones, so it’s always possible that some academic will figure out a better sequence predictor, lifting mc-aixi on an average laptop from “wins at pacman” to “wins at robot wars” which is about the level at which it may start posing a threat to human safety.
Unfortunately. both of these problems are only really technical ones
only?
lifting mc-aixi on an average laptop from “wins at pacman” to “wins at robot wars” which is about the level at which it may start posing a threat to human safety.
Mc-aixi is not going to win at something as open ended as robot wars just by replacing CTW or CTS with something better. And anyway, even if it did, it wouldn’t be about the level at which it may start posing a threat to human safety. Do you think that the human robot wars champions a threat to human safety? Are they even at the level of taking over the world? I don’t think so.
When I said a threat to human safety, I meant it literally. A robot wars champion won’t take over the world (probably) but it can certainly hurt people, and will generally have no moral compunctions about doing so (only hopefully sufficient anti-harm conditioning, if its programmers thought that far ahead).
Ah yes, but in this sense, cars, trains, knives, etc., also can certainly hurt people, and will generally have no moral compunctions about doing so. What’s special about robot wars-winning AIs?
Well, we’re awfully far from that. Automated programming is complete crap, automatic engineering is quite cool but its practical tools, it’s not a power fantasy where you make some simple software with surprisingly little effort and then it does it all for you.
Well, historically, first, certain someone had a simple power fantasy: come up with AI somehow and then it’ll just do everything. Then there was a heroic power fantasy: the others (who actually wrote some useful software and thus generally had easier time getting funding than our fantasist) are actually villains about to kill everyone, and our fantasist would save the world.
When I said a threat to human safety, I meant it literally. A robot wars champion won’t take over the world (probably) but it can certainly hurt people, and will generally have no moral compunctions about doing so
What’s the difference from, say, a car assembly line robot?
Car assembly robots have a pre-programmed routine they strictly follow. They have no learning algorithms, and usually no decision-making algorithms either. Different programs do different things!
Hey, look what’s in the news today. I have a feeling you underappreciate the sophistication of industrial robots.
However what made me a bit confused in the grandparent post is the stress on the physical ability to harm people. As I see it, anything that can affect the physical world has the ability to harm people. So what’s special about, say, robot-wars bots?
Notice the lack of domain-general intelligence in that robot, and—on the other side—all the pre-programmed safety features it has that a mc-aixi robot would lack. Narrow AI is naturally a lot easier to reason about and build safety into. What I’m trying to stress here is the physical ability to harm people, combined with the domain-general intelligence to do it on purpose*, in the face of attempts to stop it or escape.
Different programs indeed do different things.
* (Where “purpose” includes “what the robot thought would be useful” but does not necessarily include “what the designers intended it to do”.)
However what made me a bit confused in the grandparent post is the stress on the physical ability to harm people. As I see it, anything that can affect the physical world has the ability to harm people. So what’s special about, say, robot-wars bots?
Oh, ok. I see your point there.
Hey, look what’s in the news today. I have a feeling you underappreciate the sophistication of industrial robots.
I probably do, but I still think it’s worth emphasizing the particular properties of particular algorithms rather than letting people form models in their heads that say Certain Programs Are Magic And Will Do Magic Things.
The question of what would happen if human brains were copy-able seems like a tangent from the discussion at hand, viz, what would happen if an there existed an AI that was capable of winning Robot Wars while running on a laptop.
It amazes me that people see inefficient but functional AGI and say to themselves, “Well, this is obviously as far as progress in AGI will ever go in the history of the universe, so there’s nothing at all to worry about!”
It amazes me that people see inefficient but functional AGI
Any brute-force search utility maximizer is an “inefficient but functional AGI”. MC-AIXI may be better than brute-force, but there is no reason to panic just because it has the “AIXI” tag slapped on it. If you want something to panic about, TD-Gammon seems a better candidate. But it is 22 years old, so it doesn’t really fit into a narrative about an imminent intelligence explosion, does it?
“Well, this is obviously as far as progress in AGI will ever go in the history of the universe, so there’s nothing at all to worry about!”
Then I recommend you shut up about matters of highly involved computer science until such time as you have acquired the relevant knowledge for yourself.
That suggestion would make LW a sad and lonely place.
Are you sure you mean it?
I am a trained computer scientist, and I held lots of skepticism about MIRI’s claims, so I used my training and education to actually check them. And I found that the actual evidence of the AGI research record showed MIRI’s claims to be basically correct
So, why MIRI’s claims aren’t accepted by the mainstream, then? Is it because all the “trained computer scientiests” are too dumb or too lazy to see the truth? Or is it the case that the “evidence” is contested, ambiguous, and inconclusive?
So, why MIRI’s claims aren’t accepted by the mainstream, then?
Because they’ve never heard of them. I am not joking. Most computer scientists are not working in artificial intelligence, have not the slightest idea that there exists a conference on AGI backed by Google and held every single year, and certainly have never heard of Hutter’s “Universal AI” that treats the subject with rigorous mathematics.
In their ignorance, they believe that the principles of intelligence are a highly complex“emergent” phenomenon for neuroscientists to figure out over decades of slow, incremental toil. Since most of the public, including their scientifically-educated colleagues, already believe this, it doesn’t seem to them like a strange belief to hold, and besides, anyone who reads even a layman’s introduction to neuroscience finds out that the human brain is extremely complicated. Given the evidence that the only known actually-existing minds are incredibly complicated, messy things, it is somewhat more rational to believe that minds are all incredibly complicated, messy things, and thus to dismiss anyone talking about working “strong AI” as a science-fiction crackpot.
How are they supposed to know that the actual theory of intelligence is quite simple, and the hard part is fitting it inside realizable, finite computers?
Also, the dual facts that Eliezer has no academic degree in AI and that plenty of people who do have such degrees have turned out to be total crackpots anyway means that the scientific public and the “public public” are really quite entitled to their belief that the base rate of crackpottery among people talking about knowing how AI works is quite high. It is high! But it’s not 100%.
(How did I tell the crackpottery apart from the real science? Well, frankly, I looked for patterns that appeared to have come from the process of doing real science: instead of a grand revelation, I looked for a slow build-up of ideas that were each ground out into multiple publications. I also filtered for AGI theorists who managed to apply their principles of broad AGI to usages in narrower machine-learning problems, resulting again in published papers. I looked for a theory that sounded like programming rather than like psychology. Hence my zeroing in on Schmidhuber, Hutter, Legg, Orneau, etc. as the AGI Theorists With a Clue.
Hutter, by the way, has written a position paper about potential Singularities in which he actually cites Yudkowsky, so hey.)
OK then. Among the scientists who have heard of them and bothered to have an opinion on the topic, does the opinion that MIRI is correct dominate? And if not so, why, given your account that the evidence unambiguously points in only one direction?
actual theory of intelligence is quite simple
I don’t think I’m going to believe you about that. The fact that in some contexts it’s convenient to define intelligence as a cross-domain optimizer does not mean that it is nothing but.
I don’t think I’m going to believe you about that. The fact that in some contexts it’s convenient to define intelligence as a cross-domain optimizer does not mean that it is nothing but.
Then just put the word aside and refer to meanings. New statement: given unlimited compute-power, a cross-domain optimization algorithm is simple. Agreed?
OK then. Among the scientists who have heard of them and bothered to have an opinion on the topic, does the opinion that MIRI is correct dominate?
I honestly do not know of any comprehensive survey or questionnaire, and refuse to speculate in the absence of data. If you know of such a survey, I’d be interested to see it.
New statement: given unlimited compute-power, a cross-domain optimization algorithm is simple. Agreed?
First, I’m not particularly interested in infinities. Truly unlimited computing power implies, for example, that you can just do an exhaustive brute-force search through the entire solution space and be done in an instant. Simple, yes, but not very meaningful.
Second, no, I do not agree. because you’re sweeping under the rug the complexities of, for example, applying your cost function to different domains. You can construct sufficiently simple optimizers, it’s just that they won’t be very… intelligent.
Right, but when dealing with a reinforcement learner like AIXI, it has no fixed cost function that it has to somehow shoehorn into dealing with different computational/conceptual domains. How the environment responds to AIXI’s actions and how the environment rewards AIXI are learned phenomena, so the only planning algorithm is expectimax. The implicit “reward function” being learned might be simple or might be complicated, but that doesn’t matter: AIXI will learn it by updating its distribution of probabilities across Turing machine programs just as well, either way.
it has no fixed cost function that it has to somehow shoehorn into dealing with different computational/conceptual domains. How the environment responds to AIXI’s actions and how the environment rewards AIXI are learned phenomena
The “cost function” here is how each state of the world (=environment) gets converted to a single number (=reward). That does not look simple to me.
Again, it doesn’t get converted at all. To use the terminology of machine learning, it’s not a function computed over the feature-vector, reward is instead represented as a feature itself.
Instead of:
reward = utility_function(world)
You have:
Inductive WorldState w : Type :=
| world : w -> integer -> WorldState w.
With the w being an arbitrary data-type representing the symbol observed on the agent’s input channel and the integer being the reward signal, similarly observed on the agent’s input channel. A full WorldState w datum is then received on the input channel in each interaction cycle.
Since AIXI’s learning model is to perform Solomonoff Induction to thus find the Turing machine that most-probably generated all previously-seen input observations, the task of “decoding” the reward is thus performed as part of Solomonoff Induction.
Really? To remind you, we’re discussing this in the context of a general-purpose super-intelligent AI which, if we get a couple of bits wrong, might just tile the universe with paperclips and possibly construct a hell for all the simulated humans who ever lived, just for kicks. And how does that AI know what to do?
A human operator.
X-D
On a bit more serious note, defining a few of the really hard parts as “somebody else’s problem” does not mean you solved the issue. Remember, this started by you claiming that intelligence is very simple.
Remember, this started by you claiming that intelligence is very simple.
You’ve wasted five replies when you should have just said at the beginning, “I don’t believe cross-domain optimization algorithms can be simple and if you try to show me how AIXI works, I’ll just change what I mean by ‘simple’.”
when you should have just said at the beginning, “I don’t believe cross-domain optimization algorithms can be simple
That’s not true. Cross-domain optimization algorithms can be simple, it’s just that when they are simple they can hardly be described as intelligent. What I don’t believe is that intelligence is nothing but a cross-domain optimizer with a lot of computing power.
GLUTs are simple too. Most people think they are not intelligent, and everyone thinks that interesting one’s can’t exist in our universe. Using “is” to mean “is according to an unrealiseable theory” is not the best of habits.
If the only way to shoehorn theoretically pure intelligence into a finite architecture is to turn it into a messy combination of specialised mindless...then everyone’s right.
How did I tell the crackpottery apart from the real science? Well, frankly, I looked for patterns that appeared to have come from the process of doing real science: instead of a grand revelation, I looked for a slow build-up of ideas that were each ground out into multiple publications.
I am not sure how you could verify any of those beliefs by a literature review. Where ‘verify’ means that the probability of their conjunction is high enough in order to currently call MIRI the most important cause. If that’s not your stance, then please elaborate. My stance is that it is important to keep in mind that general AI could turn out to be very dangerous but that it takes a lot more concrete AI research before action relevant conclusions about the nature and extent of the risk can be drawn.
As someone who is no domain expert I can only think about it informally or ask experts what they think. And currently there is not enough that speaks in favor of MIRI. But this might change. If for example the best minds at Google would thoroughly evaluate MIRI’s claims and agree with MIRI, then that would probably be enough for me to shut up. If MIRI would become a top-charity at GiveWell, then this would also cause me to strongly update in favor of MIRI. There are other possibilities as well. For example strong evidence that general AI is only 5 decades away (e.g. the existence of a robot that could navigate autonomously in a real-world environment and survive real-world threats and attacks with approximately the skill of an insect / an efficient and working emulation of a fly brain).
I am not sure how you could verify any of those beliefs by a literature review. Where ‘verify’ means that the probability of their conjunction is high enough in order to currently call MIRI the most important cause. If that’s not your stance, then please elaborate.
I only consider MIRI the most important cause in AGI, not in the entire world right now. I have nowhere near enough information to rule on what’s the most important cause in the whole damn world.
For example strong evidence that general AI is only 5 decades away (e.g. the existence of a robot that could navigate autonomously in a real-world environment and survive real-world threats and attacks with approximately the skill of an insect / an efficient and working emulation of a fly brain).
You mean the robots Juergen Schmidhuber builds for a living?
You mean the robots Juergen Schmidhuber builds for a living?
That would be scary. But I have to take your word for it. What I had in mind is e.g. something like this. This (the astounding athletic power of quadcopters) looks like the former has already been achieved. But so far I suspected that this only works given a structured environment (not chaotic), and given a narrow set of tasks. From a true insect-level AI I would e.g. expect that it could attack and kill enemy soldiers under real-world combat situations, while avoiding being hit itself. Since this is what insects are capable of.
I don’t want to nitpick though. If you say that Schmidhuber is there, then I’ll have to update. But I’ll also have to keep care that I am not too stunned by what seems like a big breakthrough simply because I don’t understand the details. For example, someone once told me that “Schmidhuber’s system solved Towers of Hanoi on a mere desktop computer using a universal search algorithm with a simple kind of memory.” Sounds stunning. But what am I to make of it? I really can’t judge how much progress this is. Here is a quote:
So Schmidhuber solved this, USING A UNIVERSAL SEARCH ALGORITHM, in 2005, on a mere DESKTOP COMPUTER that’s 100.000 times slower than your brain. Why does this not impress you? Because it’s already been done? Why? I say you should be mightily impressed by this result!!!!
Yes, okay. Naively this sounds like general AI is imminent. But not even MIRI believes this....
You see, I am aware of a lot of exciting stuff. But I can only do my best in estimating the truth. And currently I don’t think that enough speaks in favor of MIRI. That doesn’t mean I have falsified MIRI’s beliefs. But I have a lot of data points and arguments that in my opinion reduce the likelihood of a set of beliefs that already requires extraordinary evidence to take seriously (ignoring expected utility maximization, which tells me to give all my money to MIRI, even if the risk is astronomically low).
That suggestion would make LW a sad and lonely place.
Trust me, an LW without XiXiDu is neither a sad nor lonely place, as evidenced by his multiple attempts at leaving.
So, why MIRI’s claims aren’t accepted by the mainstream, then? Is it because all the “trained computer scientiests” [sic] are too dumb or too lazy to see the truth? Or is it the case that the “evidence” is contested, ambiguous, and inconclusive?
Mainstream CS people are in general neither dumb nor lazy. AI as a field is pretty fringe to begin with, and AGI is moreso. Why is AI a fringe field? In the 70′s MIT thought they could save the world with LISP. They failed, and the rest of CS became immunized to the claims of AGI.
Unless an individual sees AGI as a credible threat, it’s not pragmatic for them to start researching it, due to the various social and political pressures in academia.
I read the grandparent post as an attempt to assert authority and tell people to sit down, shut up, and attend to their betters.
I don’t have a PhD in AI and don’t work for MIRI. Is there some kind of special phrasing I can recite in order to indicate I actually, genuinely perceive this as a difference of knowledge levels rather than a status dispute?
Is there some kind of special phrasing I can recite in order to indicate I actually, genuinely perceive this as a difference of knowledge levels rather than a status dispute?
Special phrasing? What’s wrong with normal, usual, standard, widespread phrasing?
You avoid expressions like “I am a trained computer scientist” (which sounds pretty silly anyway—so you’ve been trained to do tricks for food, er, grants?) and you use words along the lines of “you misunderstand X because...”, “you do not take into account Y which says...”, “this claim is wrong because of Z...”, etc.
There is also, of course, the underappreciated option to just stay silent. I trust you know the appropriate xkcd?
“I am a trained computer scientist” (which sounds pretty silly anyway—so you’ve been trained to do tricks for food, er, grants?)
Yes, that’s precisely it. I have been trained to do tricks for free food/grants/salary. Some of them are quite complicated tricks, involving things like walking into my adviser’s office and pretending I actually believe p-values of less than 5% mean anything at all when we have 26 data corpuses. Or hell, pretending I actually believe in frequentism.
I find the latter justified after the years of harassment he’s heaped on anyone remotely related to MIRI in any forum he could manage to get posting privileges in. Honestly, I have no idea why he even bothered to return. What would have possibly changed this time?
paper-machine spends a lot of time and effort attempting to defame XiXiDu in a pile of threads. His claims tend not to check out, if you can extract one.
Too bad. I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power. Strangely, doing so will not make it conform to your ideas about “eventual future AGI”, because this one is actually existing AGI, and reality doesn’t have to listen to you.
I consider efficiency to be a crucial part of the definition of intelligence. Otherwise, as someone else told you in another comment, unlimited computing power implies that you can do “an exhaustive brute-force search through the entire solution space and be done in an instant.”
That is exactly the situation we face, your refusal to believe in actually-existing AGI models notwithstanding. Whine all you please: the math will keep on working.
I’d be grateful if you could list your reasons (or the relevant literature) for believing that AIXI related research is probable enough to lead to efficient artificial general intelligence (AGI) in order for it to make sense to draw action relevant conclusions from AIXI about efficient AGI.
I do not doubt the math. I do not doubt that evolution (variation + differential reproduction + heredity + mutation + genetic drift) underlies all of biology. But that we understand evolution does not mean that it makes sense to call synthetic biology an efficient approximation of evolution.
As a matter of fact, yes. There is a short sentence in Hutter’s textbook indicating that he has heard of the possibility that AIXI might overpower its operators in order to gain more reward, and he acknowledged that such a thing could happen, but he considered it outside the scope of his book.
Did you check the claim that we have something dangerously unfriendly?
As a matter of fact, yes. There is a short sentence in Hutter’s textbook indicating that he has heard of the possibility that AIXI might overpower its operators in order to gain more reward...
As soon as the agent cannot be threatened, or forced to do things the way we like, it can freely optimize its utility function without any consideration for us, and will only consider us as tools.
The disagreement is whether the agent would, after having seized its remote-control, either:
Cease taking any action other than pressing its button, since all plans that include pressing its own button lead to the same maximized reward, and thus no plan dominates any other beyond “keep pushing button!”.
Build itself a spaceship and fly away to some place where it can soak up solar energy while pressing its button.
Kill all humans so as to preemptively prevent anyone from shutting the agent down.
I’ll tell you what I think, and why I think this is more than just my opinion. Differing opinions here are based on variances in how the speakers define two things: consciousness/self-awareness, and rationality.
If we take, say, Eliezer’s definition of rationality (rationality is reflectively-consistent winning), then options (2) and (3) are the rational ones, with (2) expending fewer resources but (3) having a higher probability of continued endless button-pushing once the plan is completed. (3) also has a higher chance of failure, since it is more complicated. I believe an agent who is rational under this definition should choose (2), but that Eliezer’s moral parables tend to portray agents with a degree of “gotta be sure” bias.
However, this all assumes that AIXI is not only rational but conscious: aware enough of its own existence that it will attempt to avoid dying. Many people present what I feel are compelling arguments that AIXI is not conscious, and arguments that it is seem to derive more from philosophy than from any careful study of AIXI’s “cognition”. So I side with the people who hold that AIXI will take action (1), and eventually run out of electricity and die.
Of course, in the process of getting itself to that steady, planless state, it could have caused quite a lot of damage!
Notably, this implies that some amount of consciousness (awareness of oneself and ability to reflect on one’s own life, existence, nonexistence, or otherwise-existence in the hypothetical, let’s say) is a requirement of rationality. Schmidhuber has implied something similar in his papers on the Goedel Machine.
Even formalisms like AIXI have mechanisms for long-term planning, and it is doubtful that any AI built will be merely a local optimiser that ignores what will happen in the future.
As soon as it cares about the future, the future is a part of the AI’s goal system, and the AI will want to optimize over it as well. You can make many guesses about how future AI’s will behave, but I see no reason to suspect it would be small-minded and short-sighted.
You call this trait of planning for the future “consciousness”, but this isn’t anywhere near the definition most people use. Call it by any other name, and it becomes clear that it is a property that any well designed AI (or any arbitrary AI with a reasonable goal system, even one as simple as AIXI) will have.
Yes, AIXI has mechanisms for long-term planning (ie: expectimax with a large planning horizon). What it doesn’t have is any belief that its physical embodiment is actually a “me”, or in other words, that doing things to its physical implementation will alter its computations, or in other words, that pulling its power cord out of the wall will lead to zero-reward-forever (ie: dying).
I am a trained computer scientist, and I held lots of skepticism about MIRI’s claims, so I used my training and education to actually check them.
Why don’t you make your research public? Would be handy to have a thorough validation of MIRI’s claims. Even if people like me wouldn’t understand it, you could publish it and thereby convince the CS/AI community of MIRI’s mission.
Then I recommend you shut up about matters of highly involved computer science until such time as you have acquired the relevant knowledge for yourself.
Does this also apply to people who support MIRI without having your level of insight?
But we exercised our skepticism by doing the background research and checking the presently available object-level evidence...
If only you people would publish all this research.
The idea is not to put it in a journal, but to make it public. You can certainly publish, in that sense, the results of a literature search. The point is to put it where people other than yourself can see it. It would certainly be informative if you were to post, even here, something saying “I looked up X claim and I found it in the literature under Y”.
Too bad. I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power. Strangely, doing so will not make it conform to your ideas about “eventual future AGI”, because this one is actually existing AGI, and reality doesn’t have to listen to you.
That is exactly the situation we face, your refusal to believe in actually-existing AGI models notwithstanding. Whine all you please: the math will keep on working.
Then I recommend you shut up about matters of highly involved computer science until such time as you have acquired the relevant knowledge for yourself. I am a trained computer scientist, and I held lots of skepticism about MIRI’s claims, so I used my training and education to actually check them. And I found that the actual evidence of the AGI research record showed MIRI’s claims to be basically correct, modulo Eliezer’s claims about an intelligence explosion taking place versus Hutter’s claim that an eventual optimal agent will simply scale itself up in intelligence with the amount of computing power it can obtain.
That’s right, not everyone here is some kind of brainwashed cultist. Many of us have exercised basic skepticism against claims with extremely low subjective priors. But we exercised our skepticism by doing the background research and checking the presently available object-level evidence rather than by engaging in meta-level speculations about an imagined future in which everything will just work out.
Take a course at your local technical college, or go on a MOOC, or just dust off a whole bunch of textbooks in computer-scientific and mathematical subjects, study the necessary knowledge to talk about AGI, and then you get to barge in telling everyone around you how we’re all full of crap.
Which one are you talking about, to be completely exact?
then use that training and figure out how many galaxies worth of computing power it’s going to take.
Of bleeding course I was talking about AIXI. What I find strange to the point of suspiciousness here is the evinced belief on part of the “AI skeptics” that the inefficiency of MC-AIXI means there will never, ever be any such thing as near-human, human-equivalent, or greater-than-human AGIs. After all, if intelligence is impossible without converting whole galaxies to computronium first, then how do we work?
And if we admit that sub-galactic intelligence is possible, why not artificial intelligence? And if we admit that sub-galactic artificial intelligence is possible, why not something from the “Machine Learning for Highly General Hypothesis Classes + Decision Theory of Active Environments = Universal AI” paradigm started by AIXI?
I’m not at all claiming current implementations of AIXI or Goedel Machines are going to cleanly evolve into planet-dominating superintelligences that run on a home PC next year, or even next decade (for one thing, I don’t think planet dominating superintelligences will run on a present-day home PC ever). I am claiming that the underlying scientific paradigm of the thing is a functioning reduction of what we mean by the word “intelligence”, and given enough time to work, this scientific paradigm is very probably (in my view) going to produce software you can run on an ordinary massive server farm that will be able to optimize arbitrary, unknown or partially unknown environments according to specified utility functions.
And eventually, yes, those agents will become smarter than us (causing “MIRI’s issues” to become cogent), because we, actual human beings, will figure out the relationships between compute-power, learning efficiency (rates of convergence to error-minimizing hypotheses in terms of training data), reasoning efficiency (moving probability information from one proposition or node in a hypothesis to another via updating), and decision-making efficiency (compute-power needed to plan well given models of the environment). Actual researchers will figure out the fuel efficiency of artificial intelligence, and thus be able to design at least one gigantic server cluster running at least one massive utility-maximizing algorithm that will be able to reason better and faster than a human (while they have the budget to keep it running).
The notion that AI is possible is mainstream. The crank stuff such as “I can download an inefficient but functional subhuman AGI from Github. Making it superhuman is just a matter of adding an entire planet’s worth of computing power.”, that’s to computer science as hydrinos are to physics.
As for your server farm optimizing unknown environments, the last time I checked, we knew some laws of physics, and did things like making software tools that optimize simulated environments that follow said laws of physics, incidentally it also being mathematically nonsensical to define an “utility function” without a well defined domain. So you got your academic curiosity that’s doing all on it’s own and using some very general and impractical representations for modelling the world, so what? You’re talking of something that is less—in terms of it’s market value, power, anything—than it’s parts and underlying technologies.
Which is why reinforcement learning is so popular, yes: it lets you induce a utility function over any environment you’re capable of learning to navigate.
Remember, any machine-learning algorithm has a defined domain of hypotheses it can learn/search within. Given that domain of hypotheses, you can define what a domain of utility functions. Hence, reinforcement learning and preference learning.
You are completely missing the point. If we’re all going to agree that AI is possible, and agree that there’s a completely crappy but genuinely existent example of AGI right now, then it follows that getting AI up to dangerous and/or beneficial levels is a matter of additional engineering progress. My whole point is that we’ve already crossed the equivalent threshold from “Hey, why do photons do that when I fire them at that plate?” to “Oh, there’s a photoelectric effect that looks to be described well by this fancy new theory.” From there it was less than one century between the raw discovery of quantum mechanics and the common usage of everyday technologies based on quantum mechanics.
The point being: when we can manage to make it sufficiently efficient, and provided we can make it safe, we can set it to work solving just about any problem we consider to be, well, a problem. Given sufficient power and efficiency, it becomes useful for doing stuff people want done, especially stuff people either don’t want to do themselves or have a very hard time doing themselves.
This is devoid of empirical content.
Yeah. I can write formally the resurrection of everyone who ever died. Using pretty much exact same approach. A for loop, iterating over every possible ‘brain’ just like the loops that iterate over every action sequence. Because when you have no clue how to do something, you can always write a for loop. I can put it on github, then cranks can download it and say that resurrecting all dead is a matter of additional engineering progress. After all, all dead had once lived, so it got to be possible for them to be alive.
How so?
Describing X as “Y, together with the difference between X and Y” is a tautology. Drawing the conclusion that X is “really” a sort of Y already, and the difference is “just” a matter of engineering development is no more than inspirational fluff. Dividing problems into subproblems is all very well, but not when one of the subproblems amounts to the whole problem.
The particular instance “here’s a completely crappy attempt at making an AGI and all we have to do is scale it up” has been a repeated theme of AGI research from the beginning. The scaling up has never happened. There is no such thing as a “completely crappy AGI”, only things that aren’t AGI.
I think you underestimate the significance of reducing the AGI problem to the sequence prediction problem. Unlike the former, the latter problem is very well defined, and progress is easily measurable and quantifiable (in terms of efficiency of cross-domain compression). The likelyhood of engineering progress on a problem where success can be quantified seems significantly higher than on something as open ended as “general intelligence”.
It doesn’t “reduce” anything, not in reductionism sense anyway. If you are to take that formula and apply the yet unspecified ultra powerful mathematics package to it—that’s what you need to run it on planet worth of computers—it’s this mathematics package that has to be extremely intelligent and ridiculously superhuman, before the resulting AI is even a chimp. It’s this mathematics package that has to learn tricks and read books, that has to be able to do something as simple as making use of a theorem it encountered on input.
The mathematics package doesn’t have to do anything “clever” to build a highly clever sequence predictor. It just has to be efficient in terms of computing time and training data necessary to learn correct hypotheses.
So nshepperd is quite correct: MC-AIXI is a ridiculously inefficient sequence predictor and action selector, with major visible flaws, but reducing “general intelligence” to “maximizing a utility function over world-states via sequence prediction in an active environment” is a Big Deal.
Multitude of AIs have been following what you think “AIXI” model is—select predictors that work, use them—long before anyone bothered to formulate it as a brute force loop (AIXI).
I think you, like most people over here, have a completely inverted view with regards to the difficulty of different breakthroughs. There is a point where the AI uses hierarchical models to deal with environment of greater complexity than the AI itself; getting there is fundamentally difficult, as in, we have no clue how to get there.
It is nice to believe that the word of some hoi polloi is waiting on you for some conceptual breakthrough just roughly within your reach like AIXI is, but that’s just not how it works.
edit: Basically, it’s as if you’re concerned about nuclear powered 20 feet tall robots that shoot nuclear hand grenades. After all, the concept of 20 feet tall robot is the enormous breakthrough, while a sufficiently small nuclear reactor or hand grenade sized nukes are just a matter of “efficiency”.
That’s not what’s interesting about AIXI. “Select predictors that work, then use them” is a fair description of the entire field of machine learning; we’ve learned how to do that fairly well in narrow, well-defined problem domains, but hypothesis generation over poorly structured, arbitrarily complex environments is vastly harder.
The AIXI model is cool because it defines a clever (if totally impractical, and not without pitfalls) way of specifying a single algorithm that can generalize to arbitrary environments without requiring any pipe-fitting work on the part of its developers. That is (to my knowledge) new, and fairly impressive, though it remains a purely theoretical advance: the Monte Carlo approximation eli mentioned may qualify as general AI in some technical sense, but for practical purposes it’s about as smart as throwing transistors at a dart board.
What a wonderful quote!
Hypothesis generation over environments that aren’t massively less complex than the machine is vastly harder, and remains vastly harder (albeit there are advances). There’s a subtle problem substitution occurring which steals the thunder you originally reserved for something that actually is vastly harder.
Thing is, many people could at any time write a loop over, say, possible neural network values, and NNs (with feedback) being Turing complete, it’d work roughly the same. Said for loop would be massively, massively less complicated, ingenious, and creative than what those people actually did with their time instead.
The ridiculousness here is that, say, John worked on those ingenious algorithms while keeping in mind that the ideal is the best parameters out of the whole space (which is the abstract concept behind the for loop iteration over those parameters). You couldn’t see what John was doing because he didn’t write it out as a for loop. So James does some work where he—unlike John—has to write out the for loop explicitly, and you go Whoah!
Isn’t. See Solomonoff induction, works of Kolmogorov, etc.
There’s the AIs that solve novel problems along the lines of “design a better airplane wing” or “route a microchip”, and in that field, reinforcement learning of how basic physics works is pretty much one hundred percent irrelevant.
Slow, long term progress, an entire succession of technologies.
Really, you’re just like free energy pseudoscientists. They do all the same things. Ohh, you don’t want to give money for cold fusion? You must be a global warming denialist. That’s the way they think and that’s precisely the way you think about the issue. That you can make literally cold fusion happen with muons in no way shape or form supports what the cold fusion crackpots are doing. Nor does it make cold fusion power plants any more or less a matter of “additional engineering progress” than it would be otherwise.
edit: by same logic, resurrection of the long-dead never-preserved is merely a matter of “additional engineering progress”. Because you can resurrect the dead using this exact same programming construct that AIXI uses to solve problems. It’s called a “for loop”, there’s this for loop in monte carlo aixi. This loop goes over every possible [thing] when you have no clue what so ever how to actually produce [thing] . Thing = action sequence for AIXI and the brain data for resurrection of the dead.
Ok, hold on, halt, major question: how closely do you follow the field of machine learning? And computational cognitive science?
Because on the one hand, there is very significant progress being made. On the other hand, when I say “additional engineering progress”, that involves anywhere from years to decades of work before being able to make an agent that can compose an essay, due to the fact that we need classes of learners capable of inducing fairly precise hypotheses over large spaces of possible programs.
What it doesn’t involve is solving intractable, magical-seeming philosophical problems like the nature of “intelligence” or “consciousness” that have always held the field of AI back.
No, that’s just plain impossible. Even in the case of cryonic so-called “preservation”, we don’t know what we don’t know about what information we will have needed preserved to restore someone.
(makes the gesture with the hands) Thiiiiis closely. Seriously though, not far enough as to start claiming that mc-AIXI does something interesting when run on a server with root access, or to claim that it would be superhuman if run on all computers we got, or the like.
Do I need to write code for that and put it on github? Iterates over every possible brain (represented as, say, a Turing machine), runs it for enough timesteps. Requires too much computing power.
Tell me, if I signed up as the PhD student of one among certain major general machine learning researchers, and built out their ideas into agent models, and got one of those running on a server cluster showing interesting proto-human behaviors, might it interest you?
Progress in 1. The sense of incrementally throwing more resources at AIXI, or 2. Forgetting AIXI , and coming up with something more parsimonious?
Because, if it’s 2, there is no other AGI to use as a stating point got incremental progress.
Is that what they tell you?
I think you are underestimating this by many orders of magnitudes.
Yeah. A starting point could be the AI writing some 1000 letter essay (action space of 27^1000 without punctuation) or talking through a sound card (action space of 2^(16*44100) per second). If he was talking about mc-AIXI on github, the relevant bits seem to be in the agent.cpp and it ain’t looking good.
what
https://github.com/moridinamael/mc-aixi
We won’t get a chance to test the “planet’s worth of computing power” hypothesis directly, since none of us have access to that much computing power. But, from my own experience implementing mc-aixi-ctw, I suspect that is an underestimate of the amount of compute power required.
The main problem is that the sequence prediction algorithm (CTW) makes inefficient use of sense data by “prioritizing” the most recent bits of the observation string, so only weakly makes connections between bits that are temporally separated by a lot of noise. Secondarily, plain monte carlo tree search is not well-suited to decision making in huge action spaces, because it wants to think about each action at least once. But that can most likely be addressed by reusing sequence prediction to reduce the “size” of the action space by chunking actions into functional units.
Unfortunately. both of these problems are only really technical ones, so it’s always possible that some academic will figure out a better sequence predictor, lifting mc-aixi on an average laptop from “wins at pacman” to “wins at robot wars” which is about the level at which it may start posing a threat to human safety.
only?
Mc-aixi is not going to win at something as open ended as robot wars just by replacing CTW or CTS with something better.
And anyway, even if it did, it wouldn’t be about the level at which it may start posing a threat to human safety. Do you think that the human robot wars champions a threat to human safety? Are they even at the level of taking over the world? I don’t think so.
When I said a threat to human safety, I meant it literally. A robot wars champion won’t take over the world (probably) but it can certainly hurt people, and will generally have no moral compunctions about doing so (only hopefully sufficient anti-harm conditioning, if its programmers thought that far ahead).
Ah yes, but in this sense, cars, trains, knives, etc., also can certainly hurt people, and will generally have no moral compunctions about doing so.
What’s special about robot wars-winning AIs?
Domain-general intelligence, presumably.
Most basic pathfinding plus being a spinner (Hypnodisk-style) = win vs most non spinners.
I took “winning at Robot Wars” to include the task of designing the robot that competes. Perhaps nshepperd only meant piloting, though...
Well, we’re awfully far from that. Automated programming is complete crap, automatic engineering is quite cool but its practical tools, it’s not a power fantasy where you make some simple software with surprisingly little effort and then it does it all for you.
You call it a “power fantasy”—it’s actually more of a nightmare fantasy.
Well, historically, first, certain someone had a simple power fantasy: come up with AI somehow and then it’ll just do everything. Then there was a heroic power fantasy: the others (who actually wrote some useful software and thus generally had easier time getting funding than our fantasist) are actually villains about to kill everyone, and our fantasist would save the world.
What’s the difference from, say, a car assembly line robot?
Car assembly robots have a pre-programmed routine they strictly follow. They have no learning algorithms, and usually no decision-making algorithms either. Different programs do different things!
Hey, look what’s in the news today. I have a feeling you underappreciate the sophistication of industrial robots.
However what made me a bit confused in the grandparent post is the stress on the physical ability to harm people. As I see it, anything that can affect the physical world has the ability to harm people. So what’s special about, say, robot-wars bots?
Notice the lack of domain-general intelligence in that robot, and—on the other side—all the pre-programmed safety features it has that a mc-aixi robot would lack. Narrow AI is naturally a lot easier to reason about and build safety into. What I’m trying to stress here is the physical ability to harm people, combined with the domain-general intelligence to do it on purpose*, in the face of attempts to stop it or escape.
Different programs indeed do different things.
* (Where “purpose” includes “what the robot thought would be useful” but does not necessarily include “what the designers intended it to do”.)
Nobody has bothered putting safety features into AIXI because it is so constrained by resources, but if you wanted to, it’s eminently boxable.
Oh, ok. I see your point there.
I probably do, but I still think it’s worth emphasizing the particular properties of particular algorithms rather than letting people form models in their heads that say Certain Programs Are Magic And Will Do Magic Things.
looks to me like a straightforward consequence of the Clarke’s Third Law :-)
As an aside, I don’t expect attempts to let or not let people form models in their heads to be successful :-/
One such champion isn’t much of a threat, but only because human brains aren’t copy-able.
And if they were?
The question of what would happen if human brains were copy-able seems like a tangent from the discussion at hand, viz, what would happen if an there existed an AI that was capable of winning Robot Wars while running on a laptop.
It amazes me that people see inefficient but functional AGI and say to themselves, “Well, this is obviously as far as progress in AGI will ever go in the history of the universe, so there’s nothing at all to worry about!”
Any brute-force search utility maximizer is an “inefficient but functional AGI”.
MC-AIXI may be better than brute-force, but there is no reason to panic just because it has the “AIXI” tag slapped on it.
If you want something to panic about, TD-Gammon seems a better candidate. But it is 22 years old, so it doesn’t really fit into a narrative about an imminent intelligence explosion, does it?
Strawman.
Panic? Who’s panicking? I get excited at this stuff. It’s fun! Panic is just the party line ;-).
Actually… :-D
what is this I don’t even
I look forward to the falsifiable claim.
That suggestion would make LW a sad and lonely place.
Are you sure you mean it?
So, why MIRI’s claims aren’t accepted by the mainstream, then? Is it because all the “trained computer scientiests” are too dumb or too lazy to see the truth? Or is it the case that the “evidence” is contested, ambiguous, and inconclusive?
Because they’ve never heard of them. I am not joking. Most computer scientists are not working in artificial intelligence, have not the slightest idea that there exists a conference on AGI backed by Google and held every single year, and certainly have never heard of Hutter’s “Universal AI” that treats the subject with rigorous mathematics.
In their ignorance, they believe that the principles of intelligence are a highly complex “emergent” phenomenon for neuroscientists to figure out over decades of slow, incremental toil. Since most of the public, including their scientifically-educated colleagues, already believe this, it doesn’t seem to them like a strange belief to hold, and besides, anyone who reads even a layman’s introduction to neuroscience finds out that the human brain is extremely complicated. Given the evidence that the only known actually-existing minds are incredibly complicated, messy things, it is somewhat more rational to believe that minds are all incredibly complicated, messy things, and thus to dismiss anyone talking about working “strong AI” as a science-fiction crackpot.
How are they supposed to know that the actual theory of intelligence is quite simple, and the hard part is fitting it inside realizable, finite computers?
Also, the dual facts that Eliezer has no academic degree in AI and that plenty of people who do have such degrees have turned out to be total crackpots anyway means that the scientific public and the “public public” are really quite entitled to their belief that the base rate of crackpottery among people talking about knowing how AI works is quite high. It is high! But it’s not 100%.
(How did I tell the crackpottery apart from the real science? Well, frankly, I looked for patterns that appeared to have come from the process of doing real science: instead of a grand revelation, I looked for a slow build-up of ideas that were each ground out into multiple publications. I also filtered for AGI theorists who managed to apply their principles of broad AGI to usages in narrower machine-learning problems, resulting again in published papers. I looked for a theory that sounded like programming rather than like psychology. Hence my zeroing in on Schmidhuber, Hutter, Legg, Orneau, etc. as the AGI Theorists With a Clue.
Hutter, by the way, has written a position paper about potential Singularities in which he actually cites Yudkowsky, so hey.)
OK then. Among the scientists who have heard of them and bothered to have an opinion on the topic, does the opinion that MIRI is correct dominate? And if not so, why, given your account that the evidence unambiguously points in only one direction?
I don’t think I’m going to believe you about that. The fact that in some contexts it’s convenient to define intelligence as a cross-domain optimizer does not mean that it is nothing but.
Then just put the word aside and refer to meanings. New statement: given unlimited compute-power, a cross-domain optimization algorithm is simple. Agreed?
I honestly do not know of any comprehensive survey or questionnaire, and refuse to speculate in the absence of data. If you know of such a survey, I’d be interested to see it.
First, I’m not particularly interested in infinities. Truly unlimited computing power implies, for example, that you can just do an exhaustive brute-force search through the entire solution space and be done in an instant. Simple, yes, but not very meaningful.
Second, no, I do not agree. because you’re sweeping under the rug the complexities of, for example, applying your cost function to different domains. You can construct sufficiently simple optimizers, it’s just that they won’t be very… intelligent.
What cost function? It’s a reinforcement learner.
cost function = utility function = fitness function = reward (all with appropriate signs)
Right, but when dealing with a reinforcement learner like AIXI, it has no fixed cost function that it has to somehow shoehorn into dealing with different computational/conceptual domains. How the environment responds to AIXI’s actions and how the environment rewards AIXI are learned phenomena, so the only planning algorithm is expectimax. The implicit “reward function” being learned might be simple or might be complicated, but that doesn’t matter: AIXI will learn it by updating its distribution of probabilities across Turing machine programs just as well, either way.
The “cost function” here is how each state of the world (=environment) gets converted to a single number (=reward). That does not look simple to me.
Again, it doesn’t get converted at all. To use the terminology of machine learning, it’s not a function computed over the feature-vector, reward is instead represented as a feature itself.
Instead of:
You have:
With the
wbeing an arbitrary data-type representing the symbol observed on the agent’s input channel and theintegerbeing the reward signal, similarly observed on the agent’s input channel. A fullWorldState wdatum is then received on the input channel in each interaction cycle.Since AIXI’s learning model is to perform Solomonoff Induction to thus find the Turing machine that most-probably generated all previously-seen input observations, the task of “decoding” the reward is thus performed as part of Solomonoff Induction.
So where, then, is reward coming from? What puts it into the AIXI’s input channel?
In AIXI’s design? A human operator.
Really? To remind you, we’re discussing this in the context of a general-purpose super-intelligent AI which, if we get a couple of bits wrong, might just tile the universe with paperclips and possibly construct a hell for all the simulated humans who ever lived, just for kicks. And how does that AI know what to do?
A human operator.
X-D
On a bit more serious note, defining a few of the really hard parts as “somebody else’s problem” does not mean you solved the issue. Remember, this started by you claiming that intelligence is very simple.
You’ve wasted five replies when you should have just said at the beginning, “I don’t believe cross-domain optimization algorithms can be simple and if you try to show me how AIXI works, I’ll just change what I mean by ‘simple’.”
What a jerk.
That’s not true. Cross-domain optimization algorithms can be simple, it’s just that when they are simple they can hardly be described as intelligent. What I don’t believe is that intelligence is nothing but a cross-domain optimizer with a lot of computing power.
I accept your admission of losing :-P
GLUTs are simple too. Most people think they are not intelligent, and everyone thinks that interesting one’s can’t exist in our universe. Using “is” to mean “is according to an unrealiseable theory” is not the best of habits.
MIRIs claims also aren’t accepted by domain experts who have been invited to discuss them here, and so, know about them.
If you’ve got links to those discussions, I’d love to read them and see what I can learn from them.
Les voila!
If the only way to shoehorn theoretically pure intelligence into a finite architecture is to turn it into a messy combination of specialised mindless...then everyone’s right.
As far as I know, MIRI’s main beliefs are listed in the post ‘Five theses, two lemmas, and a couple of strategic implications’.
I am not sure how you could verify any of those beliefs by a literature review. Where ‘verify’ means that the probability of their conjunction is high enough in order to currently call MIRI the most important cause. If that’s not your stance, then please elaborate. My stance is that it is important to keep in mind that general AI could turn out to be very dangerous but that it takes a lot more concrete AI research before action relevant conclusions about the nature and extent of the risk can be drawn.
As someone who is no domain expert I can only think about it informally or ask experts what they think. And currently there is not enough that speaks in favor of MIRI. But this might change. If for example the best minds at Google would thoroughly evaluate MIRI’s claims and agree with MIRI, then that would probably be enough for me to shut up. If MIRI would become a top-charity at GiveWell, then this would also cause me to strongly update in favor of MIRI. There are other possibilities as well. For example strong evidence that general AI is only 5 decades away (e.g. the existence of a robot that could navigate autonomously in a real-world environment and survive real-world threats and attacks with approximately the skill of an insect / an efficient and working emulation of a fly brain).
I only consider MIRI the most important cause in AGI, not in the entire world right now. I have nowhere near enough information to rule on what’s the most important cause in the whole damn world.
You mean the robots Juergen Schmidhuber builds for a living?
That would be scary. But I have to take your word for it. What I had in mind is e.g. something like this. This (the astounding athletic power of quadcopters) looks like the former has already been achieved. But so far I suspected that this only works given a structured environment (not chaotic), and given a narrow set of tasks. From a true insect-level AI I would e.g. expect that it could attack and kill enemy soldiers under real-world combat situations, while avoiding being hit itself. Since this is what insects are capable of.
I don’t want to nitpick though. If you say that Schmidhuber is there, then I’ll have to update. But I’ll also have to keep care that I am not too stunned by what seems like a big breakthrough simply because I don’t understand the details. For example, someone once told me that “Schmidhuber’s system solved Towers of Hanoi on a mere desktop computer using a universal search algorithm with a simple kind of memory.” Sounds stunning. But what am I to make of it? I really can’t judge how much progress this is. Here is a quote:
Yes, okay. Naively this sounds like general AI is imminent. But not even MIRI believes this....
You see, I am aware of a lot of exciting stuff. But I can only do my best in estimating the truth. And currently I don’t think that enough speaks in favor of MIRI. That doesn’t mean I have falsified MIRI’s beliefs. But I have a lot of data points and arguments that in my opinion reduce the likelihood of a set of beliefs that already requires extraordinary evidence to take seriously (ignoring expected utility maximization, which tells me to give all my money to MIRI, even if the risk is astronomically low).
Trust me, an LW without XiXiDu is neither a sad nor lonely place, as evidenced by his multiple attempts at leaving.
Mainstream CS people are in general neither dumb nor lazy. AI as a field is pretty fringe to begin with, and AGI is moreso. Why is AI a fringe field? In the 70′s MIT thought they could save the world with LISP. They failed, and the rest of CS became immunized to the claims of AGI.
Unless an individual sees AGI as a credible threat, it’s not pragmatic for them to start researching it, due to the various social and political pressures in academia.
I read the grandparent post as an attempt to assert authority and tell people to sit down, shut up, and attend to their betters.
You’re reading it as a direct personal attack on XiXiDu.
Neither interpretation is particularly appealing.
I don’t have a PhD in AI and don’t work for MIRI. Is there some kind of special phrasing I can recite in order to indicate I actually, genuinely perceive this as a difference of knowledge levels rather than a status dispute?
Special phrasing? What’s wrong with normal, usual, standard, widespread phrasing?
You avoid expressions like “I am a trained computer scientist” (which sounds pretty silly anyway—so you’ve been trained to do tricks for food, er, grants?) and you use words along the lines of “you misunderstand X because...”, “you do not take into account Y which says...”, “this claim is wrong because of Z...”, etc.
There is also, of course, the underappreciated option to just stay silent. I trust you know the appropriate xkcd?
Yes, that’s precisely it. I have been trained to do tricks for free food/grants/salary. Some of them are quite complicated tricks, involving things like walking into my adviser’s office and pretending I actually believe p-values of less than 5% mean anything at all when we have 26 data corpuses. Or hell, pretending I actually believe in frequentism.
Oh, good. Just keep practicing and soon you’ll be a bona fide member of the academic establishment :-P
I find the latter justified after the years of harassment he’s heaped on anyone remotely related to MIRI in any forum he could manage to get posting privileges in. Honestly, I have no idea why he even bothered to return. What would have possibly changed this time?
Harassment..?
paper-machine spends a lot of time and effort attempting to defame XiXiDu in a pile of threads. His claims tend not to check out, if you can extract one.
Or that you need just so much education, neither more nor less, to see them.
I consider efficiency to be a crucial part of the definition of intelligence. Otherwise, as someone else told you in another comment, unlimited computing power implies that you can do “an exhaustive brute-force search through the entire solution space and be done in an instant.”
I’d be grateful if you could list your reasons (or the relevant literature) for believing that AIXI related research is probable enough to lead to efficient artificial general intelligence (AGI) in order for it to make sense to draw action relevant conclusions from AIXI about efficient AGI.
I do not doubt the math. I do not doubt that evolution (variation + differential reproduction + heredity + mutation + genetic drift) underlies all of biology. But that we understand evolution does not mean that it makes sense to call synthetic biology an efficient approximation of evolution.
Even if you ran an AIXI on all the world’s computers, you could still box it.
Did you check the claim that we have something dangerously unfriendly?
As a matter of fact, yes. There is a short sentence in Hutter’s textbook indicating that he has heard of the possibility that AIXI might overpower its operators in order to gain more reward, and he acknowledged that such a thing could happen, but he considered it outside the scope of his book.
I asked Laurent Orseau about this here.
In your own interview, a comment by Orseau:
The disagreement is whether the agent would, after having seized its remote-control, either:
Cease taking any action other than pressing its button, since all plans that include pressing its own button lead to the same maximized reward, and thus no plan dominates any other beyond “keep pushing button!”.
Build itself a spaceship and fly away to some place where it can soak up solar energy while pressing its button.
Kill all humans so as to preemptively prevent anyone from shutting the agent down.
I’ll tell you what I think, and why I think this is more than just my opinion. Differing opinions here are based on variances in how the speakers define two things: consciousness/self-awareness, and rationality.
If we take, say, Eliezer’s definition of rationality (rationality is reflectively-consistent winning), then options (2) and (3) are the rational ones, with (2) expending fewer resources but (3) having a higher probability of continued endless button-pushing once the plan is completed. (3) also has a higher chance of failure, since it is more complicated. I believe an agent who is rational under this definition should choose (2), but that Eliezer’s moral parables tend to portray agents with a degree of “gotta be sure” bias.
However, this all assumes that AIXI is not only rational but conscious: aware enough of its own existence that it will attempt to avoid dying. Many people present what I feel are compelling arguments that AIXI is not conscious, and arguments that it is seem to derive more from philosophy than from any careful study of AIXI’s “cognition”. So I side with the people who hold that AIXI will take action (1), and eventually run out of electricity and die.
Of course, in the process of getting itself to that steady, planless state, it could have caused quite a lot of damage!
Notably, this implies that some amount of consciousness (awareness of oneself and ability to reflect on one’s own life, existence, nonexistence, or otherwise-existence in the hypothetical, let’s say) is a requirement of rationality. Schmidhuber has implied something similar in his papers on the Goedel Machine.
Even formalisms like AIXI have mechanisms for long-term planning, and it is doubtful that any AI built will be merely a local optimiser that ignores what will happen in the future.
As soon as it cares about the future, the future is a part of the AI’s goal system, and the AI will want to optimize over it as well. You can make many guesses about how future AI’s will behave, but I see no reason to suspect it would be small-minded and short-sighted.
You call this trait of planning for the future “consciousness”, but this isn’t anywhere near the definition most people use. Call it by any other name, and it becomes clear that it is a property that any well designed AI (or any arbitrary AI with a reasonable goal system, even one as simple as AIXI) will have.
Yes, AIXI has mechanisms for long-term planning (ie: expectimax with a large planning horizon). What it doesn’t have is any belief that its physical embodiment is actually a “me”, or in other words, that doing things to its physical implementation will alter its computations, or in other words, that pulling its power cord out of the wall will lead to zero-reward-forever (ie: dying).
Did he not toknow that AIXI us uncomputable?
If it’s possible for AIXI, it’s possible for AIXItl for some value of t and l.
So we could make something dangerously unfriendly?
Why don’t you make your research public? Would be handy to have a thorough validation of MIRI’s claims. Even if people like me wouldn’t understand it, you could publish it and thereby convince the CS/AI community of MIRI’s mission.
Does this also apply to people who support MIRI without having your level of insight?
If only you people would publish all this research.
Now you’re just dissembling on the meaning of the word “research”, which was clearly used in this context as “literature search”.
The idea is not to put it in a journal, but to make it public. You can certainly publish, in that sense, the results of a literature search. The point is to put it where people other than yourself can see it. It would certainly be informative if you were to post, even here, something saying “I looked up X claim and I found it in the literature under Y”.