What kind of experience can absolutely be ruled out as being materialist and admits only a spiritual explanation?
But it does not have to be absolute, right?
Both rationally and pragmatically, this should depend on one’s priors.
And speaking in terms of priors, when I talk to someone I usually don’t attempt to increase my certainty that the experience is not a hallucination by trying to touch that person.
Realistically, if life is sufficiently infused with spiritual experiences, then they tend to become a part of the world’s model. If one’s priors are overwhelmingly against that, then one can still focus on materialistic explanation, but if one’s priors are sufficiently flexible, one would probably end up with Occam-razor-like view (if there are too many spiritual experiences in one’s life, it’s not very parsimonious to have to explain each of them away, it’s easier to just integrate them into one’s worldview as primary empirical material, just like one does with most of the empirical material).
Often a different thing happens. One suddenly has a very strong spiritual experience or a series of those, and one believes rather strongly for a while, because the whole thing is so overwhelming, but after a period of time the spiritual experiences stop being that radical, the memory of them fades, one steps back and reanalyzes them and one might eventually to came to a rather agnostic conclusion about all that (or one might retain a weak belief, or revert to real materialism).
My point is, what even defines an experience as “spiritual”? It seems to me like this is almost a pre-empirical metaphysical belief, one that can’t simply work as “I did not believe in it, then I had an experience, now I believe”. If you see the world in a material framework, pretty much everything can be explained by it. Any kind of mind altering experience for example can obviously just be in one’s brain—does not have to be depending on your views on consciousness, but can. And it’s not like the higher intensity of feeling would change that. As long as feeling is just an internal phenomenon to my brain, it can be of any intensity and that’s no evidence at all of anything else than my brain acting funny. So it’s not clear what would separate “spiritual experience” from simply “temporary mind impairment”. Unless e.g. one could indeed attest things like “I predicted the future” or “I learned of true things that I could not have otherwise known”, which would at least, if reliably observed, be evidence for ESP—but even ESP does not need to be explained in a dualistic, rather than materialistic, framework.
Mostly, any kind of dual substance (spirit, soul, what have you) that:
regularly and bi-directionally interacts with ordinary matter
obeys some kind of consistent set of rules
is just matter with extra steps. So materialism can almost by definition subsume any of these phenomena, even if unknown, as long as they can be empirically observed, tested and predicted.
Any kind of mind altering experience for example can obviously just be in one’s brain—does not have to be depending on your views on consciousness, but can.
Right. If one follows the “standard mainstream scientific framework”, any kind of experience whatsoever (including experience of hearing and seeing another person talking to you) is in one’s brain, the only question is what induces that experience, what is the world model behind it.
So materialism can almost by definition subsume any of these phenomena, even if unknown, as long as they can be empirically observed, tested and predicted.
Yes, but should it? This depends on one’s priors. If one has very firm priors in favor of materialism, it’s one thing. If one starts from a more agnostic and open-minded position, then it’s different.
The basic model I’m proposing is that core intuitions about consciousness tend to cluster into two camps, with most miscommunication being the result of someone failing to communicate with the other camp. For this post, we’ll call the camp of boldface author Camp #1 and the camp of quotation author Camp #2.
For example, for people who are in Camp #2 and think it makes sense to talk about qualia, and who are aware that if materialistic solution to the “hard problem of qualia” is at all possible, it is way in the future and not currently available, it makes much more sense to question materialism.
Whereas I would expect people from Camp #1 to be leaning much more towards materialism...
Yes, but should it? This depends on one’s priors. If one has very firm priors in favor of materialism, it’s one thing. If one starts from a more agnostic and open-minded position, then it’s different.
No, it’s not, that’s my point in saying this is a metaphysical position. It is not possible to perform updates on it at all. What you call “open minded” is “you already believe that a certain kind of experience qualifies as spiritual”, so you are already a dualist; you just don’t know when and how can the other substance be triggered. If a single falsifiable prediction about what things are and aren’t possible in a materialist vs. dualist world can’t be produced, then these two frameworks aren’t two sides of a testable hypothesis—instead, they are two different ways of describing and understanding the same thing.
Even bringing qualia into it doesn’t really fix things. Suppose we assume qualia are indeed the product of some spiritual substance, in some way. How can you distinguish a “pure qualia” experience from a merely “brain doing funny things” one? We know that brain stuff it’s somewhere in the regular pipeline that produces qualia, so there is a coupling there.
And again, supposing you can e.g. prove there is such a thing as a soul, what would be the difference between a true dualist framework vs. simply an extended materialism one, in which you add to your model of the world one special kind of particle/force/matter that carries consciousness? And what kind of experience would be such that it constitutes evidence in favour of it?
What you call “open minded” is “you already believe that a certain kind of experience qualifies as spiritual”
What if you are not sure?
For example, in a purely epistemological sense, I personally believe in the need to maintain a good deal of agnosticism.
Then the question becomes: if one decides that the ground rules are to maintain a good deal of agnosticism, and to admit a variety of world models as possibilities (let’s say, to put significant priors on each in a variety of mutually incompatible world models “being actually true”), then how should one move adjusting those priors depending on the evidence?
I presume that the goal is not to push some of those priors to zero, but to change their relative values...
It’s irrelevant. If a belief isn’t of the empirical type, then no information can allow you to meaningfully update. You’ll have a certain number and either stick to it your whole life or modify it arbitrarily.
As I’m saying, what does an empirical discrimination between spiritual and non-spiritual worlds look like? What kind of experience would increase or decrease your belief in a spiritual reality, and why would it—as in, what makes some rule of the world unique enough to qualify as a “dual” of material reality rather than just another part of it? That’s my question. If you can answer it, then maybe meaningful updates are possible; otherwise they’re not, and everyone will merrily go on believing what they already do, whatever happens.
everyone will merrily go on believing what they already do, whatever happens.
I certainly have been updating my personal views in this sense rather drastically.
So, empirically, “believing what they already do” does not seem to universally hold.
I don’t think the change is arbitrary at all. The change is guided by my intuition about all this. Let’s see if we can formalize this a bit.
Let’s say… let’s consider a “multinomial approximation to agnosticism”, where one takes a finite number of mutually exclusive possibilities and assigns some non-zero priors to them.
Then one conditions how likely an experience seems to be, conditional on a particular world view. If the experience seems less likely that the likelyhood of that particular world view being true according to one’s current prior, then one adjusts that prior down somewhat. One does this for each world view in one’s set of mutually exclusive possibilities.
And if some priors go down, then other priors are going up, because one still wants them to sum up to 1. And the priors for worldviews particularly compatible with this experience eat up most of this increase.
(I understand that what I am doing here is very crude, a true Bayesian should be able to do better. But I think it looks likely that one can make all this more precise and create an epistemologically reasonable procedure for adjusting one’s priors here.)
You keep missing the main point: why does a certain experience seem more or less likely based on a spiritual vs materialist world view?
That’s what it takes for a meaningful update. P(experience|spiritual)>P(experience|material) . But what experience could possibly have that property? If I trip balls, and see God himself descend from His Heaven, amidst a choir of angels who sing with beauty that makes me cry and shiver, and He speaks to me and says “BELIEVE”, His voice shaking my very core… what distinguishes that from just some very fancy hallucination my brain came up with while tripping balls?
Nothing.
That’s the point. It is utterly impossible to tell whether the experience is “spiritual” or not because I know my qualia are at the mercy of a few kg of electric meat that sometimes goes on the fritz because I gave it the wrong chemicals or I slept too little or it just decided to do so. If you’re inclined to believe it is spiritual, you will consider it validating. If you’re inclined to believe it is material, you’ll seek psychiatric help. But either way the experience conveys no new information—it just reflects your priors at you.
So now I ask, what kind of experience would most definitely NOT do that, and instead provide genuine new information that I can recognise as such? Because that’s the only kind of experience that one can truly update on.
You seem to be saying that the existence or not of god does not follow the usual rules of updating your beliefs based on evidence. I disagree with that.
Say, for example, that you put a very low (possibly zero) probability on the idea that god exists. Your argument seems to be saying that there is no sensory experience whatsoever that should make this hypothetical atheist update their beliefs on that point. Even seeing God, convincingly turn up and speak to them, repeatedly, many times, until its as normal as seeing the sky, should not apparently convince them.
I think this is bad reasoning. Yes, sensory experience can be flawed, drugs can addle your mind. That just means you don’t update all the way. I believe in the moon, but I cannot completely rule out that I have been drugged and its a hallucination. I don’t think that the rules of logic and evidence should have an exception clause for spiritual or godlike entities.
I am here more thinking of “spiritual experiences” as e.g. visions or dreams. I do think that for example a miracle that leaves more tangible, durable proof is definitely evidence that updates towards the existence of some power causing that miracle.
However the point I’m making is a bit subtler. Even the existence of gods or demons need not imply a dualist worldview. There could be entities that possess immense power and obey rules that we still do not understand; but as long as we can, with study and observation, bring them into the fold of the causal relationships between various interlocking parts of the universe, they can perfectly fit within a materialist worldview. Consider most fantasy worlds with hard magic systems, in which crazy stuff happens daily, but it all works exactly like their local version of science—there is nothing mystical about it once it’s understood.
So what I mean is more, what qualifies an experience as “spiritual”? For example, you can be a panpsychist and that would imply all sorts of weird possibilities (including small consciousnesses in nature and objects, like Japanese kami, and massive gestalt divine consciousnesses in the planet or the universe itself), but it would all still obey the rules of a single world made of matter. It just updates our understanding of what the properties of matter are. Dualism is a much weirder claim; for something to be spiritual it has to be in some way fundamentally different from the regular sort of matter (so for example acausal).
I understand what you mean now. Thanks for clarifying.
Its like the old argument about how if a “miracle” is defined as something that breaks the fundamental laws of physics then they can’t happen by definition. Observing Jesus water walking only indicates that the true laws of physics controlling buoyancy contain an exception for which a sufficient cause is being the son of god. (Its not that the code wasn’t followed, but that it contained “if” statements).
If we find a “god” who seems a lot like the ones people worship (eg, actually fathered a man called Jesus), but is made of some kind of real physical stuff (a type of matter or energy, or some new thing as yet undiscovered), then I would chalk that up as a victory for the theists, definitional issues aside. I think the only logically reasonable way of interpreting theists is to take them as postulating real physical things (made of some kind of matter, or other thing not yet understood by science). Obviously on firm evidence of such beings step one is to study them extensively. Find ways of harnessing, their capabilities. Once they were understood, and “god” derived spirits or materials were commonplace they would seem no more special than radioactivity or computers.
Often in fantasy settings with magic systems the author seems to realize that they have turned magic into a “mundane” thing that is no more special in there world than radioactivity is in ours. This cane lead them to draw a distiniction between two levels of magic, the explained “ordinary”, “mundane” magic (the one power in Wheel of time, “Wingardium Leviosa” in Harry Potter). And a deeper level of magic with less reasoned rules (the True Power in wheel of time, Harry’s mothers love protecting him in Harry potter).
(Sorry for the wall of text ramble, I think its an interesting distinction you are making.)
One knows that in principle anything can be a hallucination, and that only very rare events have true certainty (and perhaps none, because how can one be sure that information is genuinely new), but going by this, one would hardly be able to operate a car or do anything remotely risky, because anything one sees can be a hallucination.
Instead one is just doing what feels intuitively reasonable, occasionally pausing to ponder all this.
So, here it is the same, one is leaning towards what feels intuitively reasonable, occasionally pausing to ponder all this at the meta-level.
One knows that in principle anything can be a hallucination, and that only very rare events have true certainty
Well, precisely, so some metaphysical axioms I just take on faith, because that’s all I can do. Maybe I’m a Boltzmann brain existing only for a moment, but that’s not actionable, so I scratch that. And if one of my metaphysical axioms is “the world is made only of things that are empirically observable, causal, and at their fundamental level passive” (so I don’t expect some tricky demon to purposefully mess with my observations in ways I couldn’t possibly detect), then that’s it. I can’t really update away from it, because the entire framework of my epistemology (including the very notion of beliefs and Bayesian updates!) rests on it. I can fit in it all sorts of entities—including gods, demons, angels and ghosts—just fine, but I need those to still be causal, emergent entities, just like you and me, subject to some kind of natural, regular, causal law, if not the ones I’m used to. Otherwise, I got nothing.
But if I get a feel that those metaphysical axioms no longer fit without contorting things too much, I easily replace them...
This is even easier for me, because I have the current “default set” of those axioms, the one which I intuitively rely upon when I don’t do any special efforts, and the alternative sets of axioms, which I think about when I ponder all this philosophically.
I am very much aware that there is no “objective way” to choose among those sets of axioms, and that, moreover, the “true set of axioms” might not even be among the candidate sets I am aware of.
But that does not in any way prevent me from letting one of the sets of axioms I aware of to replace my current “default set of axioms” if my intuition starts suggesting that the other set of axioms fits better. That happens way before I ponder this kind of shift in my axioms philosophically and reflect on it.
So, in one period of my life I might feel materialistic, and I might live accordingly, and in a different period of my life I might feel “connected to a higher entity”, and I would live accordingly, and in yet another period I feel particularly agnostic and I would stay on a meta-level and focus on how I am not really sure...
But I don’t think you can call such a process a Bayesian update. Again, it would require you placing conditional probabilities on the various metaphysical axioms—but the very concept of probabilities and Bayes’ theorem are built upon those axioms. If causality doesn’t always hold, if there are entities that do not need to obey it, then Bayes’ theorem doesn’t apply to them. It’s just your own personal conviction shift, but you shouldn’t use Bayesian updates as a framework to think about it, nor fall prey to the illusion that it makes your decision process any better in this kind of thing. It doesn’t. Everyone is just as clueless as everyone else on these matters and no one has any hope to know better. You may pick your metaphysical axioms as they were revealed to you in a dream and they’ll be as good as anything.
You may pick your metaphysical axioms as they were revealed to you in a dream and they’ll be as good as anything.
But that’s not arbitrary at all. That probably reflects some deep subconscious intuitions which are not arbitrary.
And these kinds of intuitive updates happen first, before philosophical reflections on the meta-level.
But then we are the type of people inclined to philosophically reflect on the meta-level about all this. One can argue whether these reflections make any sense or not, we’ll still continue to reflect on the meta-level once in a while and we’ll try to apply some non-rigorous approximate reasoning, since fully rigorous reasoning is not available.
In fact, this dialog between us is an example of this kind of meta-level reflection.
Sometimes I am thinking about those metaphyhical sets of axioms as “philosophical coordinate systems”, and one of those “philosophical coordinate systems”_ might feel more convenient at a given moment, and another one might feel more convenient at a given moment, depending on how reality looks...
When I think about this philosophically, I don’t think about one of them being “really true”, and others not being “really true”. Instead, in recent years I tend to think about a multiverse, with me moving between branches of reality, between alternative realities, with those realities being governed by different systems of axioms and having somewhat different phenomenologies.
And, for example, if one is agnostic in principle, but has one dominant world view, so one of these priors is large and other priors are small, and things which happen feel very weird, this is a good reason to make one’s dominant prior smaller (and hence make other priors larger).
But it does not have to be absolute, right?
Both rationally and pragmatically, this should depend on one’s priors.
And speaking in terms of priors, when I talk to someone I usually don’t attempt to increase my certainty that the experience is not a hallucination by trying to touch that person.
Realistically, if life is sufficiently infused with spiritual experiences, then they tend to become a part of the world’s model. If one’s priors are overwhelmingly against that, then one can still focus on materialistic explanation, but if one’s priors are sufficiently flexible, one would probably end up with Occam-razor-like view (if there are too many spiritual experiences in one’s life, it’s not very parsimonious to have to explain each of them away, it’s easier to just integrate them into one’s worldview as primary empirical material, just like one does with most of the empirical material).
Often a different thing happens. One suddenly has a very strong spiritual experience or a series of those, and one believes rather strongly for a while, because the whole thing is so overwhelming, but after a period of time the spiritual experiences stop being that radical, the memory of them fades, one steps back and reanalyzes them and one might eventually to came to a rather agnostic conclusion about all that (or one might retain a weak belief, or revert to real materialism).
My point is, what even defines an experience as “spiritual”? It seems to me like this is almost a pre-empirical metaphysical belief, one that can’t simply work as “I did not believe in it, then I had an experience, now I believe”. If you see the world in a material framework, pretty much everything can be explained by it. Any kind of mind altering experience for example can obviously just be in one’s brain—does not have to be depending on your views on consciousness, but can. And it’s not like the higher intensity of feeling would change that. As long as feeling is just an internal phenomenon to my brain, it can be of any intensity and that’s no evidence at all of anything else than my brain acting funny. So it’s not clear what would separate “spiritual experience” from simply “temporary mind impairment”. Unless e.g. one could indeed attest things like “I predicted the future” or “I learned of true things that I could not have otherwise known”, which would at least, if reliably observed, be evidence for ESP—but even ESP does not need to be explained in a dualistic, rather than materialistic, framework.
Mostly, any kind of dual substance (spirit, soul, what have you) that:
regularly and bi-directionally interacts with ordinary matter
obeys some kind of consistent set of rules
is just matter with extra steps. So materialism can almost by definition subsume any of these phenomena, even if unknown, as long as they can be empirically observed, tested and predicted.
Right. If one follows the “standard mainstream scientific framework”, any kind of experience whatsoever (including experience of hearing and seeing another person talking to you) is in one’s brain, the only question is what induces that experience, what is the world model behind it.
Yes, but should it? This depends on one’s priors. If one has very firm priors in favor of materialism, it’s one thing. If one starts from a more agnostic and open-minded position, then it’s different.
Cf. https://www.lesswrong.com/posts/NyiFLzSrkfkDW4S7o/why-it-s-so-hard-to-talk-about-consciousness which notes that on the qualia-related group of issues people are mostly divided into 2 camps which don’t really understand each other:
For example, for people who are in Camp #2 and think it makes sense to talk about qualia, and who are aware that if materialistic solution to the “hard problem of qualia” is at all possible, it is way in the future and not currently available, it makes much more sense to question materialism.
Whereas I would expect people from Camp #1 to be leaning much more towards materialism...
No, it’s not, that’s my point in saying this is a metaphysical position. It is not possible to perform updates on it at all. What you call “open minded” is “you already believe that a certain kind of experience qualifies as spiritual”, so you are already a dualist; you just don’t know when and how can the other substance be triggered. If a single falsifiable prediction about what things are and aren’t possible in a materialist vs. dualist world can’t be produced, then these two frameworks aren’t two sides of a testable hypothesis—instead, they are two different ways of describing and understanding the same thing.
Even bringing qualia into it doesn’t really fix things. Suppose we assume qualia are indeed the product of some spiritual substance, in some way. How can you distinguish a “pure qualia” experience from a merely “brain doing funny things” one? We know that brain stuff it’s somewhere in the regular pipeline that produces qualia, so there is a coupling there.
And again, supposing you can e.g. prove there is such a thing as a soul, what would be the difference between a true dualist framework vs. simply an extended materialism one, in which you add to your model of the world one special kind of particle/force/matter that carries consciousness? And what kind of experience would be such that it constitutes evidence in favour of it?
What if you are not sure?
For example, in a purely epistemological sense, I personally believe in the need to maintain a good deal of agnosticism.
Then the question becomes: if one decides that the ground rules are to maintain a good deal of agnosticism, and to admit a variety of world models as possibilities (let’s say, to put significant priors on each in a variety of mutually incompatible world models “being actually true”), then how should one move adjusting those priors depending on the evidence?
I presume that the goal is not to push some of those priors to zero, but to change their relative values...
It’s irrelevant. If a belief isn’t of the empirical type, then no information can allow you to meaningfully update. You’ll have a certain number and either stick to it your whole life or modify it arbitrarily.
As I’m saying, what does an empirical discrimination between spiritual and non-spiritual worlds look like? What kind of experience would increase or decrease your belief in a spiritual reality, and why would it—as in, what makes some rule of the world unique enough to qualify as a “dual” of material reality rather than just another part of it? That’s my question. If you can answer it, then maybe meaningful updates are possible; otherwise they’re not, and everyone will merrily go on believing what they already do, whatever happens.
I certainly have been updating my personal views in this sense rather drastically.
So, empirically, “believing what they already do” does not seem to universally hold.
I don’t think the change is arbitrary at all. The change is guided by my intuition about all this. Let’s see if we can formalize this a bit.
Let’s say… let’s consider a “multinomial approximation to agnosticism”, where one takes a finite number of mutually exclusive possibilities and assigns some non-zero priors to them.
Then one conditions how likely an experience seems to be, conditional on a particular world view. If the experience seems less likely that the likelyhood of that particular world view being true according to one’s current prior, then one adjusts that prior down somewhat. One does this for each world view in one’s set of mutually exclusive possibilities.
And if some priors go down, then other priors are going up, because one still wants them to sum up to 1. And the priors for worldviews particularly compatible with this experience eat up most of this increase.
(I understand that what I am doing here is very crude, a true Bayesian should be able to do better. But I think it looks likely that one can make all this more precise and create an epistemologically reasonable procedure for adjusting one’s priors here.)
You keep missing the main point: why does a certain experience seem more or less likely based on a spiritual vs materialist world view?
That’s what it takes for a meaningful update. P(experience|spiritual)>P(experience|material) . But what experience could possibly have that property? If I trip balls, and see God himself descend from His Heaven, amidst a choir of angels who sing with beauty that makes me cry and shiver, and He speaks to me and says “BELIEVE”, His voice shaking my very core… what distinguishes that from just some very fancy hallucination my brain came up with while tripping balls?
Nothing.
That’s the point. It is utterly impossible to tell whether the experience is “spiritual” or not because I know my qualia are at the mercy of a few kg of electric meat that sometimes goes on the fritz because I gave it the wrong chemicals or I slept too little or it just decided to do so. If you’re inclined to believe it is spiritual, you will consider it validating. If you’re inclined to believe it is material, you’ll seek psychiatric help. But either way the experience conveys no new information—it just reflects your priors at you.
So now I ask, what kind of experience would most definitely NOT do that, and instead provide genuine new information that I can recognise as such? Because that’s the only kind of experience that one can truly update on.
You seem to be saying that the existence or not of god does not follow the usual rules of updating your beliefs based on evidence. I disagree with that.
Say, for example, that you put a very low (possibly zero) probability on the idea that god exists. Your argument seems to be saying that there is no sensory experience whatsoever that should make this hypothetical atheist update their beliefs on that point. Even seeing God, convincingly turn up and speak to them, repeatedly, many times, until its as normal as seeing the sky, should not apparently convince them.
I think this is bad reasoning. Yes, sensory experience can be flawed, drugs can addle your mind. That just means you don’t update all the way. I believe in the moon, but I cannot completely rule out that I have been drugged and its a hallucination. I don’t think that the rules of logic and evidence should have an exception clause for spiritual or godlike entities.
I am here more thinking of “spiritual experiences” as e.g. visions or dreams. I do think that for example a miracle that leaves more tangible, durable proof is definitely evidence that updates towards the existence of some power causing that miracle.
However the point I’m making is a bit subtler. Even the existence of gods or demons need not imply a dualist worldview. There could be entities that possess immense power and obey rules that we still do not understand; but as long as we can, with study and observation, bring them into the fold of the causal relationships between various interlocking parts of the universe, they can perfectly fit within a materialist worldview. Consider most fantasy worlds with hard magic systems, in which crazy stuff happens daily, but it all works exactly like their local version of science—there is nothing mystical about it once it’s understood.
So what I mean is more, what qualifies an experience as “spiritual”? For example, you can be a panpsychist and that would imply all sorts of weird possibilities (including small consciousnesses in nature and objects, like Japanese kami, and massive gestalt divine consciousnesses in the planet or the universe itself), but it would all still obey the rules of a single world made of matter. It just updates our understanding of what the properties of matter are. Dualism is a much weirder claim; for something to be spiritual it has to be in some way fundamentally different from the regular sort of matter (so for example acausal).
I understand what you mean now. Thanks for clarifying.
Its like the old argument about how if a “miracle” is defined as something that breaks the fundamental laws of physics then they can’t happen by definition. Observing Jesus water walking only indicates that the true laws of physics controlling buoyancy contain an exception for which a sufficient cause is being the son of god. (Its not that the code wasn’t followed, but that it contained “if” statements).
If we find a “god” who seems a lot like the ones people worship (eg, actually fathered a man called Jesus), but is made of some kind of real physical stuff (a type of matter or energy, or some new thing as yet undiscovered), then I would chalk that up as a victory for the theists, definitional issues aside. I think the only logically reasonable way of interpreting theists is to take them as postulating real physical things (made of some kind of matter, or other thing not yet understood by science). Obviously on firm evidence of such beings step one is to study them extensively. Find ways of harnessing, their capabilities. Once they were understood, and “god” derived spirits or materials were commonplace they would seem no more special than radioactivity or computers.
Often in fantasy settings with magic systems the author seems to realize that they have turned magic into a “mundane” thing that is no more special in there world than radioactivity is in ours. This cane lead them to draw a distiniction between two levels of magic, the explained “ordinary”, “mundane” magic (the one power in Wheel of time, “Wingardium Leviosa” in Harry Potter). And a deeper level of magic with less reasoned rules (the True Power in wheel of time, Harry’s mothers love protecting him in Harry potter).
(Sorry for the wall of text ramble, I think its an interesting distinction you are making.)
But that’s not how one operates in the world.
One knows that in principle anything can be a hallucination, and that only very rare events have true certainty (and perhaps none, because how can one be sure that information is genuinely new), but going by this, one would hardly be able to operate a car or do anything remotely risky, because anything one sees can be a hallucination.
Instead one is just doing what feels intuitively reasonable, occasionally pausing to ponder all this.
So, here it is the same, one is leaning towards what feels intuitively reasonable, occasionally pausing to ponder all this at the meta-level.
Well, precisely, so some metaphysical axioms I just take on faith, because that’s all I can do. Maybe I’m a Boltzmann brain existing only for a moment, but that’s not actionable, so I scratch that. And if one of my metaphysical axioms is “the world is made only of things that are empirically observable, causal, and at their fundamental level passive” (so I don’t expect some tricky demon to purposefully mess with my observations in ways I couldn’t possibly detect), then that’s it. I can’t really update away from it, because the entire framework of my epistemology (including the very notion of beliefs and Bayesian updates!) rests on it. I can fit in it all sorts of entities—including gods, demons, angels and ghosts—just fine, but I need those to still be causal, emergent entities, just like you and me, subject to some kind of natural, regular, causal law, if not the ones I’m used to. Otherwise, I got nothing.
But if I get a feel that those metaphysical axioms no longer fit without contorting things too much, I easily replace them...
This is even easier for me, because I have the current “default set” of those axioms, the one which I intuitively rely upon when I don’t do any special efforts, and the alternative sets of axioms, which I think about when I ponder all this philosophically.
I am very much aware that there is no “objective way” to choose among those sets of axioms, and that, moreover, the “true set of axioms” might not even be among the candidate sets I am aware of.
But that does not in any way prevent me from letting one of the sets of axioms I aware of to replace my current “default set of axioms” if my intuition starts suggesting that the other set of axioms fits better. That happens way before I ponder this kind of shift in my axioms philosophically and reflect on it.
So, in one period of my life I might feel materialistic, and I might live accordingly, and in a different period of my life I might feel “connected to a higher entity”, and I would live accordingly, and in yet another period I feel particularly agnostic and I would stay on a meta-level and focus on how I am not really sure...
But I don’t think you can call such a process a Bayesian update. Again, it would require you placing conditional probabilities on the various metaphysical axioms—but the very concept of probabilities and Bayes’ theorem are built upon those axioms. If causality doesn’t always hold, if there are entities that do not need to obey it, then Bayes’ theorem doesn’t apply to them. It’s just your own personal conviction shift, but you shouldn’t use Bayesian updates as a framework to think about it, nor fall prey to the illusion that it makes your decision process any better in this kind of thing. It doesn’t. Everyone is just as clueless as everyone else on these matters and no one has any hope to know better. You may pick your metaphysical axioms as they were revealed to you in a dream and they’ll be as good as anything.
But that’s not arbitrary at all. That probably reflects some deep subconscious intuitions which are not arbitrary.
And these kinds of intuitive updates happen first, before philosophical reflections on the meta-level.
But then we are the type of people inclined to philosophically reflect on the meta-level about all this. One can argue whether these reflections make any sense or not, we’ll still continue to reflect on the meta-level once in a while and we’ll try to apply some non-rigorous approximate reasoning, since fully rigorous reasoning is not available.
In fact, this dialog between us is an example of this kind of meta-level reflection.
Sometimes I am thinking about those metaphyhical sets of axioms as “philosophical coordinate systems”, and one of those “philosophical coordinate systems”_ might feel more convenient at a given moment, and another one might feel more convenient at a given moment, depending on how reality looks...
When I think about this philosophically, I don’t think about one of them being “really true”, and others not being “really true”. Instead, in recent years I tend to think about a multiverse, with me moving between branches of reality, between alternative realities, with those realities being governed by different systems of axioms and having somewhat different phenomenologies.
And, for example, if one is agnostic in principle, but has one dominant world view, so one of these priors is large and other priors are small, and things which happen feel very weird, this is a good reason to make one’s dominant prior smaller (and hence make other priors larger).