Transcript for:
Consciousness and Computation

What I'm doing is saying that the computations  and the mathematics are describing the activity of consciousness,  as opposed to the activity of  something that's not conscious.  In other words, what I'm doing is biting the bullet up front  and saying fundamental in my ontology are things like observers that have   conscious experiences. Because every observer,  if you imagine an observer that  has no conscious experiences,  it's not really clear what we're talking about. An observer with no conscious experiences  is nothing. I don't know what that means exactly.  You and Leibniz seem to have a lot in common. Probably so, except that he was much smarter.  One of the things that I  only very recently understood  about Leibniz, as I mentioned earlier, is that Leibniz could not imagine  a way that mind could arise from non-mind. And I think you think the same thing.  That is, you can't imagine a way that mind can arise from non-mind.  I can imagine how cognition, intelligence, and things like that could arise.  But conscious experiences, what we call qualia, I would be delighted to see the   first scientific theory that ever tries to do that.  Right now, there's nothing on the table. Well, I mean, so what would, I mean,  this question of what can arise from what is a, first of all, you have to know  what the thing you're trying to get to is. Like people say, can life arise from non-life?  And again, it's a messy business because what do we mean by life?  If we mean the specifics of life on Earth with RNA and cell membranes and all   this kind of thing, that's one question.  If we say the thing we scoop  up from the Martian soil  and it does something amazing  that we've never seen before,  is that life, is that not life? You know, it's, I think we have to know.  And I think one of the difficulties about what you're talking about is if we,  if you say, can conscious experience arise from something other than conscious experience,  if we don't know, if we don't have   a general description of the target, it's very hard to answer that question.  Just like if we say, can life arise from non-life? And we have only one example   of life here on Earth. And if you say, can conscious experience  arise from something that  isn't conscious experience,  and you ultimately have only one instance of that, which is what's happening inside you,  you don't even know that I have that same conscious experience.  So you have, you know, you're trying to explain kind of an N of one thing  of how does the thing that you feel internally arise from something that sort of   isn't you and so on? How does that arise?  And I think that's a, I mean, I'd be very interested to   understand how one would, you know, how one would   get a positive answer to that. In other words, forget, you know,  oh, there isn't a good enough theory and we don't know the electrochemistry  and we, you know, we can't see how aggregates of neurons behave and so on.  You know, there are obviously issues there, but there's a different question, which is,  you know, how do I, what's the signal of success? Right, so one issue here is that as an observer,  all I have are my conscious experiences. I actually, the notion of something physical  beyond my conscious experiences  is actually the leap.  Right, I look around. Absolutely, absolutely.  Right, the only thing we  have is what we, you know,  it's the, you know, cogito ergo sum type story. Absolutely, and so we're on the same page on that.  And I agree, I don't know  that your world of experiences  is anywhere similar to mine. I can never know that.  But what I do know is that consciousness is what I know firsthand.  What I call inanimate matter is an extrapolation. What's directly available to me are experiences,  conscious experiences, and what I call an unconscious physical world is an extrapolation  that I'm making. What I only have are my conscious experiences.  I have nothing else. If you take away my-  Let's go back to, I hadn't thought about this before this conversation,  but let's go back to the nematodes, okay? Which have precisely defined,   you know, neural nets where there really is a way to say  nematode number one feels this. And do you believe that   if I could accurately measure kind of the electrochemistry of the nematode  that I would capture kind of  that that's the whole story?  Or do you believe that there's something that is kind of beyond the physical  that is kind of not capturable  by any physical measurement  that is something about what the nematode feels? What we call physical is gonna be something  inside a four-dimensional spacetime, which is gonna be just what I as a   particular observer can observe because   I am the kind of observer I am. The reality beyond that four-dimensional spacetime  that I happen to observe  is infinitely complicated.  And I may need to go to that other deeper reality to give you a full-  So in that sense, what I can  do in terms of a physical thing  inside spacetime is probably trivial and probably inadequate.  I understand. So, I mean, this is at some level, you know,  I could unkindly say it's kind  of a Victorian theory, okay?  Because it posits that there  is what we have physically  in our minds, and what we  can sort of tell is there,  but then there's a spirit  world, which is beyond that,  that might be, you know,  for example, in the Ruliad,  for sure, in my view, we  see just tiny little slices  of the Ruliad, and there's much more there. For the things that, I mean, okay,  so one of the questions is,  is it enough for doing physics  that we sample only that tiny slice of the Ruliad? It might not be.  It might be the case that  we would sample that slice  of the Ruliad, and miracles  would keep on happening.  Weird things, weird random  things would keep on happening  that kind of poke in from  other parts of the Ruliad  that we weren't able to sense, so to speak. And that, in other words, that we are,  that it isn't a closed system, that the part of the Ruliad that we are slicing,  the slice that we're taking isn't closed enough, and so, you know, we constantly are being exposed  to other things, so an analogy. In fluid dynamics, for example, most of the time,  it's okay to just think of a fluid as both a velocity field and things like that.  Occasionally, you actually, you know, if you're making a hypersonic airplane,  you have to care about the fact that the fluid is made of molecules,  but that's a rare case. But it could be that there   are things about the world, perhaps even your   consciousness things about the world, where aspects of the Ruliad poke through,  and it isn't self-consistent to just look at the slice we are,  we know we can observe. So that's an interesting question  of to what extent is the pocket of reducibility, as I would call it, the kind of slice  where we can say things about what's gonna happen, to what extent is that closed,  and to what extent does it  have things feeding into it?  By the way, there's an analogy  of this in mathematics,  which is kind of to what  extent can you do mathematics  at the level of kind of talking about things  like the Pythagorean theorem, and or do you have to,  can you talk about the Pythagorean theorem, or every time you mention it,  do you have to go back and say, oh, and the definition of real numbers  that I'm using is this, and the following axioms,   et cetera, et cetera, et cetera, which is kind of like going down   to the level of molecules and talking about the fluid.  So, I think it is a non-trivial claim, but  a thing that I think we are deriving in, for  example, our models of physics, that there  is a sort of self-consistent layer that can  be talked about merely in terms of general  relativity and quantum mechanics and so on,  without looking down below at the details  of the whole hypergraph and all these atoms  of space doing all their complicated things. It is a scientific claim that it is enough to   merely look at this kind of continuum level of general relativity and so on.  By the way, a thing that we would really  love to do is to see things, other things,   poking through.  I mean, that's what, you know, when people  observe molecules, you know, they have water  and fluid, but yet they saw that these little  grains of pollen were kicked around and brown  in motion, and that showed there was something  below just this fluid description of water.  And we'd love to find the same kind of thing  for physical space, and that's one of my big  activities right now, is trying to  see, you know, is there an effect?  Are we going to be lucky? Because molecules, people were pretty lucky.  Molecules were big enough that you could  actually see them in 1900, so to speak.  You know, whether we will be able to see the  atoms of space, so to speak, in my lifetime,  I don't know. You know, it's a question of, you know,   what the scale is and how clever we are and so on.  But I think that this whole idea of whether  we are in a consistent bubble, so to speak,  or whether we have to appeal to things sort of  beyond our physics is a reasonable question.  I mean, that is, there are things where, you  know, I'm hoping that there are observations  that we can make with telescopes, or maybe  with other kinds of systems, but there are  observations that we can make in which the  nasty, spiny parts of the Ruliad will kind  of poke through our usual continuum view of space. And so, what you're asking, I think, is,   in the case of conscious experience, is it enough to merely talk about kind of the   laws of physics that we know, or is that a place where there's a poke through from something beyond   kind of the laws of physics that we know?  I think that's a very important and useful  question, and there's also another way of  looking at this issue, and that is, if we,  we're trying to build a scientific theory  and we're trying to find as few assumptions  as possible for our scientific theory.  We believe in Occam's razor. And so, and we've both agreed that as an observer,   all I know are my conscious experiences. So whatever conscious experiences are,   they're all I know as an observer. So in the ontology that I'm going to assume   in my scientific theory, I have a big choice. I can either put conscious experiences   in that ontology as foundational or not. And if I choose not to, then I've given myself   the scientific duty to explain where those experiences come from.  So I either postulate that they are, I say,  upfront, these are part of the ontology, these  are the assumptions I make, or I say, no,  they're not part of the assumptions, I therefore  have the duty to explain consciously. So it's my choice.  Now, it's- Well, I would like to,   just to stop you for a second there. I mean, it depends on what   kind of science you're doing. If you're doing psychology or something,   if you're doing a science that is about that, then for sure.  But one of the things that happens in science,  it's not obvious that it would be possible,  but it has proved possible, is that you can  separately look at physics, biology, chemistry.  They have interfaces, but you can choose  to concentrate on one aspect of the world.  And an obvious question is, you might make  the claim, there is no meaningful science  that can be done without  entraining consciousness in it.  That would be a potential claim. That is not what has been the observation   of the last few hundred years of science. The few last few hundred years of science has   achieved a lot without solving the problem that you say nobody has solved,   and I agree nobody has solved. But, you know, so it's a question of what it   is that you think you're going to do in your science.  Now, when you talk about Occam's razor, and,  you know, I don't know why Occam's razor is  true. I mean, it's an interesting criterion.  It's in a sense, the Roulade denies Occam's  razor, because the Roulade has everything,  all these kinds of things going on in it. But at some level, from the point of view of   abstract aesthetics, the Roulade is lovely, because it assumes nothing.  But you know, from the point of view of, you  know, is it saying, oh, the description of  what's happening, for example, let's take  an Occam's razor argument about what happens  in a fluid. The Occam's razor argument would probably be,   if the fluid is flowing from here to there, all the molecules inside it must be flowing   in exactly that direction. That would be wrong.  In other words, so, you know, and in fact,  what's true is there's very complicated stuff  going on. It just happens that the level of   looking at the whole fluid, it can be described by saying the fluid goes from here to there.  So I don't think, I mean, I think it would  be a mistake to say that there is something  kind of, there's any necessity. If there's an Occam's razor that means anything,   it means something because of the way our minds work.  I mean, one key feature of our  minds is that they're very finite.  And you know, we take all the stuff going  on in the world, and we're trying to make  a narrative about what's happening that is  simple enough that we can stuff it in our  minds and make inferences about it. And for that, Occam's razor is very useful.  Occasionally things will poke through and be  like, you know, Occam was wrong type thing.  But you know, I think it's, I think it's a  feature, you know, I think perhaps one could  even argue, you know, I've been on sort of  the hunt for things that observers like us  just take for granted. And I think in some sense, the simplicity   of explanation is something that we implicitly take for granted.  Let me see if I understand you correctly. In the same way that we observe general relativity   because of the kinds of observers we are in the Wolfram model, and in the same way that we see   quantum mechanics because of the kinds of observers we are in the Wolfram model,   we also, many people, many philosophers, many cognitive scientists, for instance, Don,   are willing to say, look, we can move beyond space time and we can find something that can give rise   to the physics that we have. And then in part by doing so,   they appeal to Occam's razor. But you're saying that also Occam's razor   itself may be something that we find appealing because of the kinds of observers we are.  Yes. 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