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  1. Biological computation and the nature of software

    A new paper is been getting some attention. It makes the case for biological computation. (This is a link to a summary, but there’s a link to the actual paper at the bottom of that article.)

    Characterizing the debate between computational functionalism and biological naturalism as camps that are hopelessly dug in, the authors propose that the brain does do computation, but that it’s a very different kind from the type done in the device you’re using to read this, which they call “biological computation.”

    The differences are that biological computation is a hybrid between digital (discrete) and analog (continuous) computing, there is no clean division between software and hardware, between algorithms and implementation, and that metabolism and energy constraints shape the processing that happens. They sum it up as, in the brain, the algorithm is the substrate.

    The authors argue that to build artificially conscious systems, it may be necessary to go with a different physical ontology, one that is closer to the way biology works.

    Let me start by saying that this paper is a big improvement over the usual arguments about the distinctions between computers and biology. The authors are making a real effort to identify what supposedly makes biology unique. Most of what they’re saying already accords with my own understanding of how the brain works, and what’s different about its computation. There are a few points where they try to pass off speculation as established fact, but those are nits.

    That said, I think they oversell some of their points. For example, the distinction between analog and digital is often less than it appears. We listen to music and watch movies all the time in digital formats that were originally recorded in analog. Yes, something can be lost in the translation from continuous to discrete signaling, but in an analog system there is always variance noise, variations between a system’s processing, both with other systems of the same type, and between runs in the same system. The trick is for the translation to reduce the quantization noise, the distortions from moving to a discrete format, so that they’re less than the variance noise in the original.

    Another is the aspect they call scale inseparability, the idea that the brain doesn’t use the layers of abstraction that technology uses. These layers exist in technology to make the engineering easier to understand and maintain, for engineers. Evolution doesn’t care about understanding so it’s not a factor in how biological systems are organized. The authors use this to imply that the software / hardware divide may be something the technology side will have to give up. That the algorithm may need to be in the substrate as it is with biology.

    I think this represents confusion about what software actually is. We usually talk about software as a set of instructions that a processor follows. In most cases, it’s convenient to think about it that way. But at a more physical level, it makes more sense to think of software as a configuration of hardware. So when software is running on hardware, the algorithm is always the substrate.

    The real distinction here is that technological computers are designed to be reconfigured on the fly. This is actually an amazing achievement when you stop and think about it. I often see articles marveling at the brain’s plasticity, its ability to rewire itself. But your computer’s memory can undergo wholesale reconfiguration on demand by loading a new software package, something brain’s can’t do, at least not quickly.

    Of course, this comes with vulnerabilities brains are far less susceptible to. One reason computers can be hacked is this ability to massively reconfigure. Not that brains are completely immune. Ant brains can be hacked by a fungal infection, and cat owners can be infected with a parasite that makes them like their cats more, and that’s aside from the ability of advertisers and propagandists to hijack our brain’s reasoning to introduce notions we might otherwise resist. But it’s a harder thing to do effectively in biological systems.

    What’s important to realize is that anything that can be done in hardware can, in principle, be done in software, at least once a minimal general computing platform is in place. You can run software that emulates other hardware platforms so you can run their software. It is true that doing it in hardware is often far more efficient in terms of performance and energy, but that comes with reduced flexibility. It’s why we now run word processors on our general purpose computers instead of the old word processing machines that once existed.

    So I don’t think the fact that current AI runs on software neural networks, in and of itself, is a showstopper. Another difference is that the brain operates with massive parallelization, far more than any current technological system. These systems can still perform something like the brain’s processing in software because they operate millions of times faster. Although the addition of GPUs, designed with parallelization in mind, help a great deal.

    But that, I think, gets to a valid concern the authors make about energy constraints. Discrete processing, and doing things with software instead of hardware, come at a cost in terms of energy and performance. This is something I do think AI researchers should be paying more attention to. All we need to do to understand how far current AI is from animal intelligence, much less human level, is look at the vast amounts of data and energy it requires to do what it does. Datacenters are sucking the power grid dry to meet their energy demands. All of which speaks to how crude the technology remains in comparison to biological intelligence.

    But this energy constraint issue is broader than just trying to reproduce biological processes. I think it’s a problem for all technological computing. And it will likely eventually result in architecture changes. Understanding how biology does it may be important, but I tend to doubt the solution will be doing it exactly like those systems.

    And this gets to a sentiment that I detect in the paper and write ups about it. It’s the idea that consciousness is a ghost in the machine, one we need to find the magic ingredients for so we can generate it. I think this is fundamentally the wrong way to think about it. Neuroscientist Hawan Lau, I think, in a Bluesky post, sums up the issue. Why do we think this might be true for consciousness when it isn’t for so many other things the body does, like motor control?

    All that said, I do like the term “biological computation.” It admits that the computation in brains is different while still acknowledging the important ways it’s the same. I suspect that won’t be enough for those strongly convinced computationalism is wrong, but it still feels like useful progress.

    What do you think about the points the authors make? Or my take on them? Are they right that a new hardware architecture is required? Or would even that be enough? Does the “biological computation” term strike the right balance?

    #AI #ArtificialIntelligence #BiologicalComputation #ComputationalFunctionalism #Consciousness #functionalism #Neuroscience #Philosophy #PhilosophyOfMind

  2. Biological computation and the nature of software

    A new paper is been getting some attention. It makes the case for biological computation. (This is a link to a summary, but there’s a link to the actual paper at the bottom of that article.)

    Characterizing the debate between computational functionalism and biological naturalism as camps that are hopelessly dug in, the authors propose that the brain does do computation, but that it’s a very different kind from the type done in the device you’re using to read this, which they call “biological computation.”

    The differences are that biological computation is a hybrid between digital (discrete) and analog (continuous) computing, there is no clean division between software and hardware, between algorithms and implementation, and that metabolism and energy constraints shape the processing that happens. They sum it up as, in the brain, the algorithm is the substrate.

    The authors argue that to build artificially conscious systems, it may be necessary to go with a different physical ontology, one that is closer to the way biology works.

    Let me start by saying that this paper is a big improvement over the usual arguments about the distinctions between computers and biology. The authors are making a real effort to identify what supposedly makes biology unique. Most of what they’re saying already accords with my own understanding of how the brain works, and what’s different about its computation. There are a few points where they try to pass off speculation as established fact, but those are nits.

    That said, I think they oversell some of their points. For example, the distinction between analog and digital is often less than it appears. We listen to music and watch movies all the time in digital formats that were originally recorded in analog. Yes, something can be lost in the translation from continuous to discrete signaling, but in an analog system there is always variance noise, variations between a system’s processing, both with other systems of the same type, and between runs in the same system. The trick is for the translation to reduce the quantization noise, the distortions from moving to a discrete format, so that they’re less than the variance noise in the original.

    Another is the aspect they call scale inseparability, the idea that the brain doesn’t use the layers of abstraction that technology uses. These layers exist in technology to make the engineering easier to understand and maintain, for engineers. Evolution doesn’t care about understanding so it’s not a factor in how biological systems are organized. The authors use this to imply that the software / hardware divide may be something the technology side will have to give up. That the algorithm may need to be in the substrate as it is with biology.

    I think this represents confusion about what software actually is. We usually talk about software as a set of instructions that a processor follows. In most cases, it’s convenient to think about it that way. But at a more physical level, it makes more sense to think of software as a configuration of hardware. So when software is running on hardware, the algorithm is always the substrate.

    The real distinction here is that technological computers are designed to be reconfigured on the fly. This is actually an amazing achievement when you stop and think about it. I often see articles marveling at the brain’s plasticity, its ability to rewire itself. But your computer’s memory can undergo wholesale reconfiguration on demand by loading a new software package, something brain’s can’t do, at least not quickly.

    Of course, this comes with vulnerabilities brains are far less susceptible to. One reason computers can be hacked is this ability to massively reconfigure. Not that brains are completely immune. Ant brains can be hacked by a fungal infection, and cat owners can be infected with a parasite that makes them like their cats more, and that’s aside from the ability of advertisers and propagandists to hijack our brain’s reasoning to introduce notions we might otherwise resist. But it’s a harder thing to do effectively in biological systems.

    What’s important to realize is that anything that can be done in hardware can, in principle, be done in software, at least once a minimal general computing platform is in place. You can run software that emulates other hardware platforms so you can run their software. It is true that doing it in hardware is often far more efficient in terms of performance and energy, but that comes with reduced flexibility. It’s why we now run word processors on our general purpose computers instead of the old word processing machines that once existed.

    So I don’t think the fact that current AI runs on software neural networks, in and of itself, is a showstopper. Another difference is that the brain operates with massive parallelization, far more than any current technological system. These systems can still perform something like the brain’s processing in software because they operate millions of times faster. Although the addition of GPUs, designed with parallelization in mind, help a great deal.

    But that, I think, gets to a valid concern the authors make about energy constraints. Discrete processing, and doing things with software instead of hardware, come at a cost in terms of energy and performance. This is something I do think AI researchers should be paying more attention to. All we need to do to understand how far current AI is from animal intelligence, much less human level, is look at the vast amounts of data and energy it requires to do what it does. Datacenters are sucking the power grid dry to meet their energy demands. All of which speaks to how crude the technology remains in comparison to biological intelligence.

    But this energy constraint issue is broader than just trying to reproduce biological processes. I think it’s a problem for all technological computing. And it will likely eventually result in architecture changes. Understanding how biology does it may be important, but I tend to doubt the solution will be doing it exactly like those systems.

    And this gets to a sentiment that I detect in the paper and write ups about it. It’s the idea that consciousness is a ghost in the machine, one we need to find the magic ingredients for so we can generate it. I think this is fundamentally the wrong way to think about it. Neuroscientist Hawan Lau, I think, in a Bluesky post, sums up the issue. Why do we think this might be true for consciousness when it isn’t for so many other things the body does, like motor control?

    All that said, I do like the term “biological computation.” It admits that the computation in brains is different while still acknowledging the important ways it’s the same. I suspect that won’t be enough for those strongly convinced computationalism is wrong, but it still feels like useful progress.

    What do you think about the points the authors make? Or my take on them? Are they right that a new hardware architecture is required? Or would even that be enough? Does the “biological computation” term strike the right balance?

    #AI #ArtificialIntelligence #BiologicalComputation #ComputationalFunctionalism #Consciousness #functionalism #Neuroscience #Philosophy #PhilosophyOfMind

  3. 🆓 Free Will – Why I Said Yes To This Interview🎙️

    “I acted on my own free will. Nobody forced me.”

    With these words, #DanielDennett opens our #Zoomposium on the question of free will – and sets the tone for a conversation that is as pointed as it is profound.

    📽 youtu.be/M2qiVz95ZYk

    📎 philosophies.de/index.php/2023

    #FreeWill #PhilosophyOfMind #Consciousness #FreeWillDebate #SelfAndIdentity #CognitiveScience #Neuroscience #MultipleDraftsModel #Functionalism #Naturalism #Materialism

  4. 🆓 Free Will – Why I Said Yes To This Interview🎙️

    “I acted on my own free will. Nobody forced me.”

    With these words, #DanielDennett opens our #Zoomposium on the question of free will – and sets the tone for a conversation that is as pointed as it is profound.

    📽 youtu.be/M2qiVz95ZYk

    📎 philosophies.de/index.php/2023

    #FreeWill #PhilosophyOfMind #Consciousness #FreeWillDebate #SelfAndIdentity #CognitiveScience #Neuroscience #MultipleDraftsModel #Functionalism #Naturalism #Materialism

  5. What is a non-functional account of consciousness supposed to be?

    I’m a functionalist. I think the mind and consciousness is about what the brain does, rather than its particular composition, or some other attribute. Which means that if another system did the same or similar things, it would make sense to say it was conscious. Consciousness is as consciousness does.

    Functionalism has some advantages over other meta-theories of consciousness. One is that since we’re talking about functionality, of capabilities, establishing consciousness in other species and systems is a matter of establishing what they can do. But it does require accepting that consciousness can come in gradations. And that “consciousness” is not a precise designation of which collection of functionality is required. So it means giving up primitivism about consciousness, accepting that rather than a single natural kind, it’s a hazy collection of many different kinds.

    It’s worth pausing to be clear on what functionalism is. It’s about cause-effect relationships. These relationships can, in principle, be modeled by Ramsey sentences, a technique David Lewis adapted from Frank Ramsey, which models a causal sequence, or entire structures of those sequences. (Suzi Travis has an excellent post which includes an introduction to them.) At the heart of the entire enterprise are these cause-effect relations.

    Of course, cause-effect relations are themselves emergent from the symmetrical (reversible) structural relations of more fundamental physics. Causes and effects attain their asymmetry due to the Second Law of Thermodynamics, the one that says entropy always increases. So another way to talk about functionalism is in terms of structural realism. Ultimately functionalism is about structural relations. (Something it took me a while to appreciate after discovering structural realism.)

    Over the years, I’ve received a lot of different reactions to this position. Not a few aren’t sure what functionalism is. Some are outraged by the idea. Others equate it with behaviorism. (Unlike behaviorism, functionalism accepts the existence of intermediate states between stimuli and response.)

    But occasionally someone responds that the idea is obvious and trivial. I think this response is interesting, because I basically agree. It is trivial, or it should be. I only started calling myself a functionalist because so many people insist that the real problem of consciousness isn’t about functionality.

    Philosophers have long argued for a version of consciousness that is beyond functionality. Ned Block, when making his distinction between phenomenal and access consciousness, while admitting there were functional notions of phenomenal consciousness, argued for a version that was something other than functionality (or intentionality, which is also relational). And David Chalmers argues that solving the hard problem of consciousness isn’t about solving the structure and relations that science can usually get a handle on.

    Anyone who’s known me for a while will be aware that I think these views are mistaken. But I have to admit something. Part of the reason I’m not enthusiastic about them is I don’t even know what a non-functional view of consciousness is supposed to be.

    I understand old school interactionist dualism well enough. But in that case there are still causes and effects. It’s just that most of them are hidden from us in some kind of non-physical substrate. But the interaction in interactionist dualism should be detectable by science, and hasn’t been, which I think is why many contemporary non-physicalists gravitate to other options.

    It’s when we get to views like property dualism and panpsychism that I start to lose understanding. We’re supposed to be talking about something beyond the functionality, beyond structure and relations, something that could be absent without making any difference in functionality (philosophical zombies), that could change without change in functionality (inverted qualia), or is in principle impossible to observe from any perspective other than the subject’s (Mary’s room). It’s not clear to me what exactly it is we’re talking about here.

    This view has epiphenomenal implications, that consciousness is causally impotent, making no difference in the world. It’s interesting that the arguments to avoid this implication inevitably sneak functionality back into the picture. One option, explored by David Chalmers in his book: The Conscious Mind, is that consciousness is causality, which strikes me as a very minimal form of functionalism. Another, one Chalmers favors, is the Russellian monist notion that consciousness, or proto-consciousness, sits in the intrinsic properties of matter, and is basically the causes behind the causes, which again, seem to amount to a form of hidden functionalism.

    But these arguments aside, it’s still unclear what exactly it is we’re talking about. It’s frequently admitted that no one can really say what it is. However, it’s typically argued that we can point to various examples to make it clear, such as the redness of an apple, the painfulness of a toothache, seeing black letters on a white page, the taste of a fruit juice, imagining the Eiffel tower, etc.

    The thing is, all of these examples strike me as examples of functionality. Redness is a distinction our visual system makes, making something distinct and of high salience, among other likely functions. A toothache obviously is a signal of a problem that needs to be dealt with. Black letters on a white page is pattern recognition to parse symbolic communication. The taste of a drink conveys information about that drink (good=keep drinking, bad=stop and maybe spit out). And remembering past experiences or simulating possible new ones, like imagining the Eiffel tower, has obvious adaptive benefits.

    I’ve read enough philosophy to know the usual response. That’s I’m identifying the functional aspects of these experiences, but that the functional description leaves out something crucial. My question is, what? Of course, I know the typical response here too. It’s ineffable. It can’t be described or analyzed. Ok, how do we know it’s there? Each of us supposedly has first person access to it. But I just indicated that my own first person access seems to indicate only functionality. Impasse.

    So I’m a functionalist, not just because I think it’s a promising approach, but because I really don’t understand the alternatives. Could I be missing something? If so, what?

    #conscioiusness #functionalism #phenomenalConsciousness #Philosophy #PhilosophyOfMind

  6. Swedish #functionalism This was the first functionalist house to be built in Örebro in an area otherwise filled with Jugend houses. #photography #silentsunday #architecture

  7. I miss the good old days, when buttons looked like buttons, and handsets looked like, you know, handsets… #industrialdesign #ux #functionalism #intercom

  8. In the last thread, someone asked what exactly is it about consciousness that illusionists say is illusory?

    One quick answer is that for illusionists, the properties people see in experience that incline us to think that consciousness is a metaphysically hard problem, are what’s illusory. In weak illusionism, the properties aren’t what they seem. In the strong version, which is usually what “illusionism” refers to, they don’t exist at all. But what exactly are these properties?

    I’m a functionalist, someone who sees consciousness experiences, and mental states overall, as more about what they do, the causal roles they play, than about any particular substance or constitution. It’s a view that I think provides a necessary explanatory layer between the mental and the physical, and so sees no barrier in principle to a full understanding of the relationship between them.

    The usual argument against functionalism is that it doesn’t seem to account for qualia, the properties of phenomenal consciousness, the “what it’s like” nature of subjective experience, such as the redness of a red apple or the painfulness of toothache. Most functionalists, if they use the term, argue that qualia can be described functionally, such as pain being an automatic evaluation of a problem with a part of the body.

    However philosophers have a number of thought experiments which claim to show that qualia and physics, including functionality, can be separated. This is where the illusionists come in. They argue qualia don’t exist, that the illusion is our impression that they do.

    But that raises the question. What exactly are qualia? I gave the standard definition above, but it seems inadequate to settle this debate. The SEP article on qualia discusses four different versions, the simplest of which might be compatible with functionalism, but others that aren’t.

    Daniel Dennett, in his 1988 Quining Qualia paper, a famous attack on the concept of qualia, provides the illusionist understanding, by noting four attributes commonly assigned to them. Summed up in the qualia Wikipedia article, they are:

    1. ineffable – they cannot be communicated, or apprehended by any means other than direct experience.
    2. intrinsic – they are non-relational properties, which do not change depending on the experience’s relation to other things.
    3. private – all interpersonal comparisons of qualia are systematically impossible.
    4. directly or immediately apprehensible by consciousness – to experience a quale is to know one experiences a quale, and to know all there is to know about that quale.

    Dennett’s description of qualia is often decried as a strawman, something he constructs to easily knock down. However, we only have to look at the most popular qualia thought experiments to see these attributes confirmed. For example, consider Frank Jackson’s knowledge argument as described through the Mary’s Room thought experiment.

    Mary is a brilliant scientist who is, for whatever reason, forced to investigate the world from a black-and-white room via a black-and-white television monitor. She specializes in the neurophysiology of vision and acquires all the physical information there is to obtain about what goes on when we see ripe tomatoes or the sky and use terms like “red”, “blue”, and so on. She discovers, for example, just which wavelength combinations from the sky stimulate the retina, and exactly how this produces via the central nervous system the contraction of the vocal cords and expulsion of air from the lungs that results in the uttering of the sentence “The sky is blue.” What happens when Mary is released from her black-and-white room or is given a color television monitor? Does she learn anything new or not? Jackson claims that she does.

    Within the assumptions of this scenario, why is Mary unable to acquire the information she can only learn by having the experience? She supposedly can’t read descriptions of it, because no one can provide that, matching Dennett’s ineffable attribute. She can’t conduct experiments to detect it, because it’s scientifically inaccessible, meeting the private attribute. And Jackson argues that qualia are epiphenomenal, which seems to meet Dennett’s intrinsic attribute.

    The same attributes are implied with the inverted spectrum concept, the idea that there’s no way to know if my experience of red looks like yours of green and vice versa. The fact that we seem unable to describe our experiences of color to each other, that they’re ineffable, private, and intrinsic, is what gives this scenario life. Likewise, the absent qualia / zombie argument, the idea of a being physically or behaviorally equivalent to a conscious one, but not itself conscious, only works if there’s no way to observe or deduce whether qualia are present.

    And yet, in all these scenarios, the subject themselves still has first person access to these phenomenal properties. For that to be possible, for that access not to be prevented by the other attributes, it has to be special in some way, according to David Chalmers, in some non-causal manner, which gives us Dennett’s directly apprehensible property.

    And what is it that makes Chalmers’ hard problem of consciousness metaphysically hard, if not these attributes? Remove them, and the thought experiments and metaphysical mysteries seem to disappear.

    So the advocates of these thought experiments and illusionists seem to agree on what qualia are. They just disagree on whether they’re real. Functionalists and other physicalists, if they use terms like “qualia” or “phenomenal properties,” are referring to a concept with less theoretical commitments. Do Dennett’s attributes show up in the more reserved versions? As Dennett himself covers in the last section of his Quining Qualia paper, it becomes a matter of “in principle” vs “in practice”.

    For ineffability, no one thinks describing experiences like the redness of red in a functional manner is obvious or easy, although it can be done to at least some extent, starting with the distinctiveness and high saliency of redness. For many experiences, the phrase, “a picture is worth a thousand words,” comes to mind. It might involve so much effort that it’s ineffable in practice, even if not in principle.

    And there are limitations on our access to how these experiences are constructed. They are cognitively impenetrable, for the simple reason that it was never adaptive for our ancestors to be able to access the early processing, such as all the underlying associations and affects red stimuli trigger, but which figure in what red experience feels like. Which makes a full description of the experience impossible with only introspective information.

    Mental content, until recently, was private due to technological limitations and our lack of knowledge about the brain. It still effectively is in virtually all cases. But with the progress in brain scanning technologies, we’re seeing the first cracks in this attribute. We still have a long way to go, but even though it’s early days, the idea that mental content is in a separate realm and utterly inaccessible seems less defensible with each passing year.

    Without absolute ineffability or privacy, it’s not necessary to bring in direct apprehension. Which isn’t to say that we don’t have privileged internal access in practice, but it’s similar to the type of access the processors in the device you’re using right now have to read and write memory that aren’t easily observable from the outside.

    And then there’s intrinsicality. Achieving functional descriptions of conscious experience typically requires looking at the upstream causes and downstream effects of what we think of as the experience. Intrinsicality assumes that there’s still something in between, something that remains with intrinsic properties, something distinct from the causal chain, somewhere where the prior causes culminate in the presentation, and from which the downstream effects flow, with some aspects still conceivably epiphenomenal. The functional shift here is to regard the experience as the whole causal chain, a more plausible stance in a massively parallel system with no central control point.

    Clarifying these attributes as difficulties in practice, rather than absolute limitations in principle, both explains our impressions of them, and transforms conscious experience from an intractable metaphysical problem to a series of scientific ones.

    This is one of the reasons I used to resist the illusionist label, and still prefer the functionalist one. The difference doesn’t seem that vast (a point David Lewis made in 1995), and mostly seems to amount to a lack of nuance in our initial understanding, rather than some deep unavoidable species-wide misperception.

    And yet for a significant portion of the population, the strong intuition is that a functional description, while explaining behavior, still leaves out something important for experience. And here we run into an intuition clash. For someone convinced that an ineffable metaphysically private aspect remains, it doesn’t seem like something science can demonstrate is or isn’t there. It becomes an extra assumption some people hold and others don’t.

    Which seems to leave us in the strange place where the two views are empirically identical, and the debate a purely philosophical one.

    Unless of course I’m missing something. What do you think? Are functionalists overreaching for a non-gap explanation? Are there fact-of-the-matter differences between illusionism and functionalism I’m overlooking? And are there ways to demonstrate the reality or non-reality of ineffable private qualities?

    https://selfawarepatterns.com/2024/08/31/illusionism-and-functionalism/

    #Consciousness #functionalism #illusionism #phenomenalConsciousness #Philosophy #PhilosophyOfMind #Qualia

  9. In the last thread, someone asked what exactly is it about consciousness that illusionists say is illusory?

    One quick answer is that for illusionists, the properties people see in experience that incline us to think that consciousness is a metaphysically hard problem, are what’s illusory. In weak illusionism, the properties aren’t what they seem. In the strong version, which is usually what “illusionism” refers to, they don’t exist at all. But what exactly are these properties?

    I’m a functionalist, someone who sees conscious experiences, and mental states overall, as more about what they do, the causal roles they play, than about any particular substance or constitution. It’s a view that I think provides a necessary explanatory layer between the mental and the physical, and so sees no barrier in principle to a full understanding of the relationship between them.

    The usual argument against functionalism is that it doesn’t seem to account for qualia, the properties of phenomenal consciousness, the “what it’s like” nature of subjective experience, such as the redness of a red apple or the painfulness of toothache. Most functionalists, if they use the term, argue that qualia can be described functionally, such as pain being an automatic evaluation of a problem with a part of the body.

    However philosophers have a number of thought experiments which claim to show that qualia and physics, including functionality, can be separated. This is where the illusionists come in. They argue qualia don’t exist, that the illusion is our impression that they do.

    But that raises the question. What exactly are qualia? I gave the standard definition above, but it seems inadequate to settle this debate. The SEP article on qualia discusses four different versions, the simplest of which might be compatible with functionalism, but others that aren’t.

    Daniel Dennett, in his 1988 Quining Qualia paper, a famous attack on the concept of qualia, provides the illusionist understanding, by noting four attributes commonly assigned to them. Summed up in the qualia Wikipedia article, they are:

    1. ineffable – they cannot be communicated, or apprehended by any means other than direct experience.
    2. intrinsic – they are non-relational properties, which do not change depending on the experience’s relation to other things.
    3. private – all interpersonal comparisons of qualia are systematically impossible.
    4. directly or immediately apprehensible by consciousness – to experience a quale is to know one experiences a quale, and to know all there is to know about that quale.

    Dennett’s description of qualia is often decried as a strawman, something he constructs to easily knock down. However, we only have to look at the most popular qualia thought experiments to see these attributes confirmed. For example, consider Frank Jackson’s knowledge argument as described through the Mary’s Room thought experiment.

    Mary is a brilliant scientist who is, for whatever reason, forced to investigate the world from a black-and-white room via a black-and-white television monitor. She specializes in the neurophysiology of vision and acquires all the physical information there is to obtain about what goes on when we see ripe tomatoes or the sky and use terms like “red”, “blue”, and so on. She discovers, for example, just which wavelength combinations from the sky stimulate the retina, and exactly how this produces via the central nervous system the contraction of the vocal cords and expulsion of air from the lungs that results in the uttering of the sentence “The sky is blue.” What happens when Mary is released from her black-and-white room or is given a color television monitor? Does she learn anything new or not? Jackson claims that she does.

    Within the assumptions of this scenario, why is Mary unable to acquire the information she can only learn by having the experience? She supposedly can’t read descriptions of it, because no one can provide that, matching Dennett’s ineffable attribute. She can’t conduct experiments to detect it, because it’s scientifically inaccessible, meeting the private attribute. And Jackson argues that qualia are epiphenomenal, which seems to meet Dennett’s intrinsic attribute.

    The same attributes are implied with the inverted spectrum concept, the idea that there’s no way to know if my experience of red looks like yours of green and vice versa. The fact that we seem unable to describe our experiences of color to each other, that they’re ineffable, private, and intrinsic, is what gives this scenario life. Likewise, the absent qualia / zombie argument, the idea of a being physically or behaviorally equivalent to a conscious one, but not itself conscious, only works if there’s no way to observe or deduce whether qualia are present.

    And yet, in all these scenarios, the subject themselves still has first person access to these phenomenal properties. For that to be possible, for that access not to be prevented by the other attributes, it has to be special in some way, according to David Chalmers, in some non-causal manner, which gives us Dennett’s directly apprehensible property.

    And what is it that makes Chalmers’ hard problem of consciousness metaphysically hard, if not these attributes? Remove them, and the thought experiments and metaphysical mysteries seem to disappear.

    So the advocates of these thought experiments and illusionists seem to agree on what qualia are. They just disagree on whether they’re real. Functionalists and other physicalists, if they use terms like “qualia” or “phenomenal properties,” are referring to a concept with less theoretical commitments. Do Dennett’s attributes show up in the more reserved versions? As Dennett himself covers in the last section of his Quining Qualia paper, it becomes a matter of “in principle” vs “in practice”.

    For ineffability, no one thinks describing experiences like the redness of red in a functional manner is obvious or easy, although it can be done to at least some extent, starting with the distinctiveness and high saliency of redness. For many experiences, the phrase, “a picture is worth a thousand words,” comes to mind. It might involve so much effort that it’s ineffable in practice, even if not in principle.

    And there are limitations on our access to how these experiences are constructed. They are cognitively impenetrable, for the simple reason that it was never adaptive for our ancestors to be able to access the early processing, such as all the underlying associations and affects red stimuli trigger, but which figure in what red experience feels like. Which makes a full description of the experience impossible with only introspective information.

    Mental content, until recently, was private due to technological limitations and our lack of knowledge about the brain. It still effectively is in virtually all cases. But with the progress in brain scanning technologies, we’re seeing the first cracks in this attribute. We still have a long way to go, but even though it’s early days, the idea that mental content is in a separate realm and utterly inaccessible seems less defensible with each passing year.

    Without absolute ineffability or privacy, it’s not necessary to bring in direct apprehension. Which isn’t to say that we don’t have privileged internal access in practice, but it’s similar to the type of access the processors in the device you’re using right now have to read and write memory that aren’t easily observable from the outside.

    And then there’s intrinsicality. Achieving functional descriptions of conscious experience typically requires looking at the upstream causes and downstream effects of what we think of as the experience. Intrinsicality assumes that there’s still something in between, something that remains with intrinsic properties, something distinct from the causal chain, somewhere where the prior causes culminate in the presentation, and from which the downstream effects flow, with some aspects still conceivably epiphenomenal. The functional shift here is to regard the experience as the whole causal chain, a more plausible stance in a massively parallel system with no central control point.

    Clarifying these attributes as difficulties in practice, rather than absolute limitations in principle, both explains our impressions of them, and transforms conscious experience from an intractable metaphysical problem to a series of scientific ones.

    This is one of the reasons I used to resist the illusionist label, and still prefer the functionalist one. The difference doesn’t seem that vast (a point David Lewis made in 1995), and mostly seems to amount to a lack of nuance in our initial understanding, rather than some deep unavoidable species-wide misperception.

    And yet for a significant portion of the population, the strong intuition is that a functional description, while explaining behavior, still leaves out something important for experience. And here we run into an intuition clash. For someone convinced that an ineffable metaphysically private aspect remains, it doesn’t seem like something science can demonstrate is or isn’t there. It becomes an extra assumption some people hold and others don’t.

    Which seems to leave us in the strange place where the two views are empirically identical, and the debate a purely philosophical one.

    Unless of course I’m missing something. What do you think? Are functionalists overreaching for a non-gap explanation? Are there fact-of-the-matter differences between illusionism and functionalism I’m overlooking? And are there ways to demonstrate the reality or non-reality of ineffable private qualities?

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    https://selfawarepatterns.com/2024/08/31/illusionism-and-functionalism/

    #Consciousness #functionalism #illusionism #phenomenalConsciousness #Philosophy #PhilosophyOfMind #Qualia

  10. I’ve reached peak #functionalism. I am writing a paper on the organismic analogy and why sociology needs it more than ever. Wow. I am a simulacrum of a simulacrum of a….or maybe just a caricature of my former self.

  11. I’ve reached peak #functionalism. I am writing a paper on the organismic analogy and why sociology needs it more than ever. Wow. I am a simulacrum of a simulacrum of a….or maybe just a caricature of my former self.