Thanks! I am surprised someone actually read all that! I regret to dump yet another, even longer one on you, but I can't help myself! I think you'll find it thought-provoking, even if you don't agree with everything. Oh well, even if it doesn't get read, I enjoy clarifying my thoughts in writing. But I would certainly appreciate any feedback, as I might be misleading myself!
I agree with most everything you've said!
I tend to use the term ‘integrated’ rather than ‘organised’. — Possibility
I usually do as well.
The proto-consciousness at the bottom-most level, in my view, is a vague awareness of more than this-here-now, whose only evidence is a one-dimensional transfer of information/energy that is immediately integrated into the system. — Possibility
Sounds close to the mark to me! Maybe the interaction itself and the consequent change in the state of the particle is what is experienced. After all, it is an
encounter. What comes to mind is to think that in an interaction, the thing is no longer completely itself. Something of the other thing has entered into it or become part of it. This goes both ways.
Really, it seems to me, for two things to interact, some sort of unity must be involved. Two things cannot remain truly, fundamentally distinct and independent and at the same time interact. They must touch. And for them to touch requires that they are of a common substance. And if they truly touch, they become in some sense continuous with one another.
Alex Rosenberg, in his
Atheist's Guide to Reality, page 178, argues that a collection of fermions and bosons cannot be "about" another collection, and that therefore, intentionality (in Brentano's sense), or "aboutness", is impossible. And this intentionality is often seen as a defining feature of consciousness. He is seeing the claim that we have thoughts about or experiences of something else as being a claim that a collection of fermions and bosons can be
about another collection.
It seems to me that when thinking about particles, we tend to think of them as being like little rocks floating in true emptiness, little impenetrable things that are truly separate from one another, each one with its own independent existence, self-standing in some sense, or having "own-being". And every interaction, it seems, is imagined to be like billiards balls banging into each other, with nothing of one ever entering into another. But I think this has to be wrong. This would make each particle a distinct substance. And I think Spinoza showed that we can't have multiple substances like that. Two truly independent things with no common substance cannot conceivably interact. It is hard to see how they would even belong to the same space.
And things like billiards balls mislead our intuitions, as the only reason they can bounce off of one another is that they are elastic, and their elasticity is a property that results from the fact that they are composed of many particles held together by forces that allow for a changing shape. Truly elementary particles, the smallest possible things, can have no such parts, and so cannot have anything like elasticity. And they probably don't have anything like a surface.
What Rosenberg says seems to reflect a faulty intuition about particles. It's as if he is thinking that a bag of rocks cannot be about another bag of rocks, or in other words, cannot be "aware" of another bag, which seems intuitively correct. There is just an arrangement of rocks and
that's it! But what you said about the "vague awareness of more than this-here-now", I think, speaks to an elementary sort of aboutness of just the sort that we need to make sense of consciousness in a large-scale system.
To understand consciousness, I think we need to understand some very low-level metaphysical matters.
How can we have unity in multiplicity? What is interaction, really? What does it mean to touch? Can something be truly one thing and still have structure?
Any description of a system is therefore always a description of the information which a system has about another system, that is to say, the correlation between the two systems. — Carlo Rovelli, ‘Reality is Not What it Seems’
Your Rovelli quote is very interesting. I'll have to read that book. I suspect that he is putting his finger perhaps on just what consciousness is, without saying so. To be aware of something is precisely to be a system with information about another system.
Isn't it the case that all interaction actually involves the two interacting things becoming entangled? And doesn't entanglement involve a situation where it no longer makes sense to treat the parts of the system as separate? They become one thing, no? From Wikipedia:
An entangled system is defined to be one whose quantum state cannot be factored as a product of states of its local constituents; that is to say, they are not individual particles but are an inseparable whole. In entanglement, one constituent cannot be fully described without considering the other(s). The state of a composite system is always expressible as a sum, or superposition, of products of states of local constituents; it is entangled if this sum necessarily has more than one term.
But it is said that entanglement is broken when decoherence occurs. But decoherence, if I understand correctly, just means that the system in question is becoming entangled with the environment or the measuring apparatus.
Isn't it also the case that when one thing interacts with another, it is only then that it itself comes to have a defined state, one that is defined in relation to that of the other? Rovelli seems to say this.
Consider the following situation. There is one astronaut floating in space. There is nothing else in the universe. How fast is she moving? How much kinetic energy is she carrying? It is undefined, right? She can neither be said to be in motion nor to be motionless. But now suppose there are two astronauts. Now we have something! There is relative motion. Suppose the distance between is increasing. The total motion of the whole system of the two is undefined. We can't say that one is still and the other is moving away or that both are moving in opposite directions. All we can say is that each is moving relative to the other. If I am one of them, I know my own velocity (but only with respect to the other)
because of my interaction with the other.
And that interaction is key. How do I know the other astronaut is there? Perhaps I have a light, which means that I receive photons that were reflected or emitted from the other body. Gravity is another factor. Each body also emits infrared photons. And so on. The only way I can know about the other is if something from them touches me.
We tend to imagine that when we see something, that there really is some sort of action-at-a-distance. Unreflectively, we think we really see "across" space. But this isn't so. It involves a local interaction in every case. But astronauts are large bodies. And there is opportunity for lots of photons to be emitted, yielding quite a good image of the other, or lots of information.
But what if, instead of astronauts, we have the smallest possible bits of matter, which are discrete and quantized? In this case, there are not many, many interactions as there are in the case of the astronauts. At any given moment, most likely, there are none at all! Particle interactions might be rare! An electron is not like an astronaut. Imagine one astronaut spinning around, firing a machine gun. If the other astronaut is nearby, they'll probably get hit. But the likelihood of a body the size of an electron getting hit is vanishingly small. An electron does not receive a constant shower of photons like a large body might. It doesn't have enough area for that. So basically, it is "in the dark". It doesn't know anything about the other particle. And this being the case, its own state is therefore undefined in the same way that the lone astronaut's was. If I am not interacting with anything else, how am I moving? Where am I?
But when an interaction does happen, suddenly I have a defined state, one defined in relation to the other thing interacted with. At the quantum level, this happens as a discrete, sudden change of state. Suddenly, some uncertainty about my state is reduced in proportion to what I have learned about the other thing.
I think this might be the basic reason why particles have the uncertainty associated with them that is so famous. It is very simply a result of each system's lack of information about the other. But this isn't a case of the other having a well-defined state while I just fail to know everything about it. No! Without this information that each has about the other, that state is simply undefined. The relation is absent and therefore such things as velocity, which is relational, is undefined.
It is important here to consider the consequences of the difference between a quantized, discrete physics with its smallest-possible elements and a continuous, infinitely divisible one. Suppose the latter, continuous case. What if light, instead of coming in discrete chunks, were actually just continuous radiation going out in all directions with a certain intensity? Then, even really, really small particles could conceivably "always see" all other things, no matter how dimly. Now it is no longer there-or-not bullets, but a continuous radiation of energy going out at all angles that inevitably arrives at the receiving body, even if with a very low intensity, no matter how small that body. The relational states of the bodies would therefore always be well-defined. And with infinitely divisible matter and infinite resolution, you could even conceivably have electron-sized astronauts, as you could have complex structure at any scale. A tiny, tiny particle would always be receiving light from all other objects in its light cone. Its position would therefore be "triangulated" always with perfect precision in relation to all those distant objects.
But for the discrete system with smallest-possible elements and energy packets, such continuous well-defined relations are impossible. And many lines of evidence suggest such discreteness in our universe. For one thing, consider that as you go down in scale, there are fewer and fewer unique structures, and they get simpler and simpler. This suggests very strongly that they are composed of smallest-possible things. You'll never find two planets exactly alike because there are so many ways of arranging such a large number of particles. But all electrons are alike. There are fewer unique subatomic particles than there are unique molecules and fewer different molecules than different basketball-sized objects. Smaller things being simpler and fewer in unique forms has always been found to be true. If matter were infinitely divisible, there would be an infinite number of ways to structure it, no matter the scale. You'd likely never see a situation like ours with many identical electrons.
The thing about these discrete interactions is that when no interactions are happening, an electron is necessarily
completely blind! Its position and momentum are therefore undefined.
The puzzle to me is the question of how, if such a situation obtains, interactions ever occur at all! How is it determined that two particles actually collide if their positions before the collision are undefined? There must be something to this picture that I am missing. Maybe the problem here is in thinking of the space between as a pure emptiness, which, for such elementary particles, means complete isolation.
Going back to the idea of interactions as involving some kind mutual contact, involvement, internalization, unity, or whatever, I suspect that this is key in something like a bound phenomenal state. There is a very large complex of such interactions that, at least momentarily, there is a unity-in-multiplicity with a shape.
It seems impossible for something to have a shape without being composed of parts. And to have parts seems to mean that in the end, it is decomposable and there is really just a bunch of fundamentally disconnected parts, and these are the only real things. There is the intuition that for something to be a unity, it must be a mereological simple, for which shape seems impossible. And yet, in our conscious states, we find that they are bound. They are unified. There is a unity in multiplicity. And they have a shape. How is this possible? Somehow, it must be the case that multiple things, in their complex of interaction, truly comprise one thing. Maybe this has to do with a complex of basic causal interaction, or touching. For things to truly touch, they must in some sense be united. Is entanglement key here?
I have often thought it curious to realize that nobody has ever seen a photon in flight, "from the side", so to speak. From the side, we see a tennis ball flying through the air only because photons are arriving on our retina that came directly from the tennis ball. Without local photon impacts on the retina, there is no seeing. All photon detections are measurements of an increase in energy somewhere, a jump in an electron's energy level. Never is a photon seen between its source and its destination. If it is detected, that's it, it has arrived. The detection point
is its destination, and it has been converted into something else. A photon, in other words, is never seen
as a photon. It is always seen only as a loss of energy at the source or a gain in energy at the destination. A photon, for us to see it in flight, would have to be emitting photons!
Further, a photon is traveling at the speed of light. This being the case, according to Einstein's theories, in the frame of something traveling at light speed, length contraction reduces the distance between source and destination to
zero! And the elapsed time from the perspective of the photon is also zero! From the photon's point of view, source-emission and destination-absorption are in the same place at the same time.
Perhaps there is our unity, our contact! Maybe there is really no such thing as a photon in free space. A figment of our models? Rather, it is maybe the way we represent what is really the direct contact between two electrons. Emission and absorption maybe only appear separated in space and time because of how we are situated relative to the event. Or maybe a photon is what brings two electrons together. Or maybe, even more radically, the two electrons are in some sense the very same electron, at least in the photon's frame.
When a photon from a distant star is absorbed in your retina, we might say that in some small way, the star is actually touching your eye directly! This suggests that our conscious state might literally be a complex of unity-in-multiplicity, a large structure of contact-action that includes everything involved, all the information being integrated. So it isn't just in our heads. The things out in the world that our bodies are interacting with are literally part of that complex, part of that mental state. There are all sorts of interactions happening at once, some between neurons, some between retina and distant star, and so on. And all connected together, they make up a certain informational structure. This is probably what constitutes the complex, bound, qualia-rich mental state.
Here's the kicker though. Ultimately, everything is connected. It is one thing. There is just one big experience going on, one big causal network. Our personal mental states seem locally limited and personal only because the whole complex of information is not integrated in my little brain. Information about the whole universe is not available to my brain. Only a limited number of causal impacts are directed at my brain at any given moment. And my mouth can therefore never report on information that isn't causally antecedent to its movements. Our personal isolation is an illusion that results from the fact that the amount of information about the rest of the universe available to any particular part of the universe at any given time is limited. What is known anywhere is a function of how information is integrated, and what is within the light-cone of what sets an absolute limit. Though at our most fundamental level, we are one, I can't remember your childhood, and so I fail to realize that I am you at the bottom-most level. Even more inaccessible to Petrichor's brain are the memories of a distant alien outside his light cone.
We could put an amnesiac, Bob, in a room with a chalk board and have him record his observations on that board. If we ask him to report what he has seen, he will consult the board to find out. Suppose we move him to another room with another board and show him different things there. Only what he has seen and recorded in that room will he be able to "remember" and report. But that doesn't mean that Bob in room A is a different person than Bob in room B. Our two brains are analogous to Bob in the two rooms. This relates to such things as split-brain experiments where some people are led to the conclusion that the severance of the corpus callosum has resulted in the transformation of one experiential subject into two, since experiments show that one hemisphere can't report observations made only by the other. This does not show that we have two different subjects. It only shows a failure to integrate information. It is possibly quite analogous to Bob in the two rooms or your brain and mine.
There is another reason, which I have gone into elsewhere, to think there is a universal subjectivity at the bottom of things, one belonging to the one substance to which everything belongs. In a nutshell, it is the fact, from your perspective, that you find yourself occupying what would otherwise (if there were no universal subject) have to be seen as an extremely unusual and fortunate perspective, that of a human brain. From an objective perspective, it isn't so surprising when you see that someone wins the lottery. But when you find that you are that someone, you are right to be surprised and to consider yourself fortunate! If there really are different, truly isolated subjects finding themselves being different things, if you find yourself being a human, you have won the lottery of lotteries. Consider all the other 3 pound hunks of matter that find themselves in less ideal circumstances! Most aren't alive!
But if what finds itself in your shoes is the very same subject that finds itself in all shoes, then you shouldn't be surprised to find yourself as a human. It isn't lucky. It's inevitable! You find yourself everywhere. This is the real solution to the whole anthropic principle issue. Fine-tuning is explained.
Also, consider the foolishness of the idea (see my rock comment below) that anything is, in itself, a thing with a definite boundary and identity that excludes most of the universe. There is no magical boundary around your body or brain that makes you separate from everything else. Why are you just a brain and not the whole ecosystem? Why not a galaxy? You are a multiplicity, no? You are more than one neuron! Why does what you are stop at the skull? Or why are you not less? Why not a single quark? And if you think yourself identical with the matter composing your brain, consider that this same matter was once scattered all over in disparate regions of space, some in a carrot, some in a cow, some in the sky, and so on. Were you this same set of particles then, but not all the others that never end up being part of your brain?
You are all of it. It only seems like you aren't because of the local limitations of information access. In this brain, You don't remember being everything else because that information simply isn't part of this brain state.
Consider that you remember your childhood but not your future. Your present self in relation to your future self is like Bob in the two rooms. But strangely, your future self will remember your present self and identify himself with you. Do you identify yourself with him? How is your relation to him any fundamentally different than your relation to your future offspring, or to me, for that matter?
Also, if things are defined relationally, what happens from the perspective of the universe as a whole? What about prior to space and time? Is anything separated? Aren't space and time the very conditions of separation?
We need to remember that a ‘rock’ is a conceptual object to you and me, but not to itself. If you break a rock in half it becomes two rocks, and there is no evidence whatsoever that the rock notices the difference. — Possibility
Oh, I absolutely agree! When I spoke of a rock, I was being sloppy and was just using it as an example of what we think of as a thing, using the intuition of something being there occupying that position. A rock, it seems, represents our most basic intuition of a thing. But really, objects (not in the subject-object relation sense, but in the "this building is a thing" sense) just have to do with the way our minds carve up the world. I don't believe in the reality of objects in this sense. I think Graham Harman is a loony-tune with his object ontology! There are no boundaries out there in the world around particular collections of particles.
As for computers, there are relations and interactions happening for sure. And there is likely a complex of interactions. But I don't think the causal network this involves has anything resembling the structure of the causal network involved in our apprehensions. It isn't integrated in the right way. Imagine our mental state in a moment as being like a big lightning flash of interaction happening in a web-like fashion, a big causal network involving objects and neural firings and all of that. Its shape is a direct result of how the brain is organized, how the body relates to the environment, and so on. Map all the interactions and make a picture of this map. Now imagine, at a given moment, an Intel chip processing some information. Map all the interactions. Much different picture, right? The causal network here has a much different shape, a much, much simpler shape. Not many bits are even being processed at once. It is much less parallel and integrated. And even if it is simulating a brain, the causal network of the computer itself has a far different structure than that of a brain, and its this substantial causal network that matters. Actual energy exchanges, not virtual ones.
But I have read that this has been achieved on a small and limited scale, where a computer simulation was capable of demonstrating a limited social ‘relationship’ with a ‘pet’. It was an interesting read (I’ll try to locate it). — Possibility
I am very skeptical. Any "demonstration" only involves showing us behavior. We can never know for sure what it's like, if anything, for the computer, no matter how human-like the behavior looks. It probably just amounts to the execution of a lot of if-then conditionals.