Well, let’s be clear: the argument I laid out is trying to refute the claim that “I can create a human-level consciousness with a Turing machine”. It doesn’t mean you couldn’t create an AI using something other than a pure Turing machine and it doesn’t mean Turing machines can’t do other smart computations. But it does mean that uploading a brain into a Von Neumann machine isn’t going to keep you alive.
So if you disagree that qualia is a basic fact of physics, what do you think it reduces to? Is there anything else that has a first-person ontology the way qualia does?
And if you think physics can tell whether something is a Turing-machine-simulating-a-brain, what’s the physical algorithm for looking at a series of physical particles and deciding whether it’s executing a particular computation or not?
So if you disagree that qualia is a basic fact of physics, what do you think it reduces to?
Something brains do, obviously. One way or another.
And if you think physics can tell whether something is a Turing-machine-simulating-a-brain, what’s the physical algorithm for looking at a series of physical particles and deciding whether it’s executing a particular computation or not?
I should perhaps be asking what evidence Searle has for thinking he knows things like what qualia is, or what a computation is. My statements were both negative: it is not clear that qualia is a basic fact of physics; it is not obvious that you can’t describe computation in physical terms. Searle just makes these assumptions.
If you must have an answer, how about this: a physical system P is a computation of a value V if adding as premises the initial and final states of P and a transition function describing the physics of P shortens a formal proof that V = whatever.
Well, let’s be clear: the argument I laid out is trying to refute the claim that “I can create a human-level consciousness with a Turing machine”. It doesn’t mean you couldn’t create an AI using something other than a pure Turing machine and it doesn’t mean Turing machines can’t do other smart computations. But it does mean that uploading a brain into a Von Neumann machine isn’t going to keep you alive.
So if you disagree that qualia is a basic fact of physics, what do you think it reduces to? Is there anything else that has a first-person ontology the way qualia does?
And if you think physics can tell whether something is a Turing-machine-simulating-a-brain, what’s the physical algorithm for looking at a series of physical particles and deciding whether it’s executing a particular computation or not?
Something brains do, obviously. One way or another.
I should perhaps be asking what evidence Searle has for thinking he knows things like what qualia is, or what a computation is. My statements were both negative: it is not clear that qualia is a basic fact of physics; it is not obvious that you can’t describe computation in physical terms. Searle just makes these assumptions.
If you must have an answer, how about this: a physical system P is a computation of a value V if adding as premises the initial and final states of P and a transition function describing the physics of P shortens a formal proof that V = whatever.
They’re not assumptions, they’re the answers to questions that have the highest probability going for them given the evidence.