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> as Chalmers says it denies the datum of experience Chalmers is a particularly ill-chosen example for this, because Chalmers also claims that his zombie twin-

by pdonis 3y ago

> as Chalmers says it denies the datum of experience Chalmers is a particularly ill-chosen example for this, because Chalmers also claims that his zombie twin--an atom-by-atom duplicate of him that is indistinguishable in all its physical properties and actions but lacks consciousness--is a coherent concept. But by his own definition, since Chalmers says his conscious experience is a direct "datum", so would zombie-Chalmers. And since zombie-Chalmers is an atom-by-atom duplicate of Chalmers, on what basis would Chalmers say that he is right when he makes this claim, but somehow zombie-Chalmers is wrong? If physicalism is true, this is simply false reasoning: zombie-Chalmers, since he is physically identical to Chalmers, must also be identical with respect to consciousness. So either Chalmers is simply denying physicalism--he has some mysterious non-physical property, in principle unexplainable in terms of the physical state of him, that zombie-Chalmers lacks--or he is simply failing to think clearly about his own position, and therefore believes that the concept of zombie-Chalmers as he defines it is coherent, when in fact it isn't. Similar remarks could be made about other concepts that are trotted out by Dennett's critics, such as "qualia", but Chalmers makes the incoherence of such positions particularly obvious.

foldr 3y ago
>And since zombie-Chalmers is an atom-by-atom duplicate of Chalmers, on what basis would Chalmers say that he is right when he makes this claim, but somehow zombie-Chalmers is wrong? This isn't quite the right question to get at the issue. Zombie Chalmers is wrong by definition as he's a hypothetical creature defined not to have any conscious experience. Real Chalmers is right iff he has conscious experiences. I think what you're getting at here is Chalmers' epiphenominalism about consciousness and its possible implications for whether or not Chalmers' belief that he has conscious experiences can be justified according to his own lights. Chalmers is well aware of this issue. It is rather a subtle one, as it is not so obvious on further examination that the belief that one has conscious experiences must necessarily be caused by conscious experiences in order to be justified. Thus, even though zombie Chalmers' belief has the same cause as real Chalmers' belief, it is conceivable that one belief may be justified while the other is not. It all depends on one's theory of justification – and it's probably an understatement to say that there are a lot of those to choose from. There is some summary of Chalmers' and others' takes on this here: https://plato.stanford.edu/entries/epiphenomenalism/#SelStu https://plato.stanford.edu/entries/epiphenomenalism/#SelStu More broadly, I would say that if you are willing to indulge Dennett in some of his more counterintuitive speculations, you could stand to be a little more generous to Chalmers here, who is certainly no fool.
- pdonis 3y ago
  > Zombie Chalmers is wrong by definition Only if you accept that Chalmers's definition of Zombie-Chalmers is consistent. But if you are a physicalist, it is not consistent, and any claims based on it are simply invalid. See further comments below. > Chalmers' epiphenominalism about consciousness Yes, that's part of the issue, but not the only part. It is true that I personally have never been able to make sense of epiphenomenalism about consciousness: the idea that my consciousness has literally nothing to do with any of my physical behavior (and remember that this doesn't just include easily observable things like the sounds I utter or the movements my body makes, but things like what can be detected in my brain in an fMRI scanner) to me seems daft. Furthermore, it doesn't make sense from an evolutionary perspective: why would organisms evolve consciousness if it had no effect on anything else? However, over and above all of that, there is the issue that, as i said above, Chalmers's definition of Zombie-Chalmers is simply inconsistent with physicalism. If physicalism is true, then the idea of a physical duplicate of you, who are conscious, that is not conscious is a contradiction in terms. As I said in an earlier post, physically identical necessarily implies identical in everything, including consciousness, if physicalism is true. > if you are willing to indulge Dennett in some of his more counterintuitive speculations, you could stand to be a little more generous to Chalmers here Nothing I have said in support of Dennett anywhere in this discussion is "indulging" him in "counterintuitive speculations". I am simply describing the basic implications of Dennett's physicalism about consciousness. For example, I have not said anything about the "Multiple Drafts" model that he propounded in Consciousness Explained, which he himself said was speculation, but I think he expected it to get more traction than it has apparently gotten. I have tried to limit myself to just the basic things that have to be the case if physicalism is true at all.
  - foldr 3y ago
    Certainly Zombie-Chalmers is inconsistent with physicalism. Chalmers is not a physicalist, and the logical/metaphysical possibility of zombies forms part of his argument against physicalism. If you want, you can just stamp your foot down and insist on physicalism (and thereby dismiss whole swathes of the philosophical literature on consciousness), but from Chalmers' point of view you'd just be begging the important questions. My point regarding Dennett is that his overall picture of consciousness also contains highly counterintuitive elements (such as e.g. his denial of any form of privileged access [1], which is not just an ad-hoc speculation tacked on to his main theory but a necessary consequence of it). I agree that Chalmers' epiphenominalism is counterintuitive too. I don't think anyone has succeeded in arriving at an overall philosophical account of consciousness that is entirely satisfying and free of implausible or counterintuitive elements. I think it's important to have a certain amount of empathy here and understand that people genuinely differ in their plausibility judgments in this domain. For example, I personally find epiphenomenalism, though implausible, to be less implausible than the denial of privileged access; I suspect you have the inverse judgment. It is unclear how to weigh these sorts of considerations against each other. [1] > I see no other way to force this issue into the open than to defend an admittedly counterintuitive theory and await enlightenment on what, exactly, I have left out. The view that I wish to defend is that our privileged access extends to no images, sensations, impressions, raw feels, or phenomenal properties at all. There are indeed all sorts of interesting things going on in our heads that have characteristics or play roles that might tempt us to call them images or sensations or impressions, but our access to these events is not only not privileged; it is highly indirect, inferential and uncertain. https://link.springer.com/chapter/10.1007/978-94-009-9479-9_6 https://link.springer.com/chapter/10.1007/978-94-009-9479-9_...

by pdonis 3y ago

foldr 3y ago

>And since zombie-Chalmers is an atom-by-atom duplicate of Chalmers, on what basis would Chalmers say that he is right when he makes this claim, but somehow zombie-Chalmers is wrong? This isn't quite the right question to get at the issue. Zombie Chalmers is wrong by definition as he's a hypothetical creature defined not to have any conscious experience. Real Chalmers is right iff he has conscious experiences. I think what you're getting at here is Chalmers' epiphenominalism about consciousness and its possible implications for whether or not Chalmers' belief that he has conscious experiences can be justified according to his own lights. Chalmers is well aware of this issue. It is rather a subtle one, as it is not so obvious on further examination that the belief that one has conscious experiences must necessarily be caused by conscious experiences in order to be justified. Thus, even though zombie Chalmers' belief has the same cause as real Chalmers' belief, it is conceivable that one belief may be justified while the other is not. It all depends on one's theory of justification – and it's probably an understatement to say that there are a lot of those to choose from. There is some summary of Chalmers' and others' takes on this here: https://plato.stanford.edu/entries/epiphenomenalism/#SelStu https://plato.stanford.edu/entries/epiphenomenalism/#SelStu More broadly, I would say that if you are willing to indulge Dennett in some of his more counterintuitive speculations, you could stand to be a little more generous to Chalmers here, who is certainly no fool.

pdonis 3y ago
> Zombie Chalmers is wrong by definition Only if you accept that Chalmers's definition of Zombie-Chalmers is consistent. But if you are a physicalist, it is not consistent, and any claims based on it are simply invalid. See further comments below. > Chalmers' epiphenominalism about consciousness Yes, that's part of the issue, but not the only part. It is true that I personally have never been able to make sense of epiphenomenalism about consciousness: the idea that my consciousness has literally nothing to do with any of my physical behavior (and remember that this doesn't just include easily observable things like the sounds I utter or the movements my body makes, but things like what can be detected in my brain in an fMRI scanner) to me seems daft. Furthermore, it doesn't make sense from an evolutionary perspective: why would organisms evolve consciousness if it had no effect on anything else? However, over and above all of that, there is the issue that, as i said above, Chalmers's definition of Zombie-Chalmers is simply inconsistent with physicalism. If physicalism is true, then the idea of a physical duplicate of you, who are conscious, that is not conscious is a contradiction in terms. As I said in an earlier post, physically identical necessarily implies identical in everything, including consciousness, if physicalism is true. > if you are willing to indulge Dennett in some of his more counterintuitive speculations, you could stand to be a little more generous to Chalmers here Nothing I have said in support of Dennett anywhere in this discussion is "indulging" him in "counterintuitive speculations". I am simply describing the basic implications of Dennett's physicalism about consciousness. For example, I have not said anything about the "Multiple Drafts" model that he propounded in Consciousness Explained, which he himself said was speculation, but I think he expected it to get more traction than it has apparently gotten. I have tried to limit myself to just the basic things that have to be the case if physicalism is true at all.
- foldr 3y ago
  Certainly Zombie-Chalmers is inconsistent with physicalism. Chalmers is not a physicalist, and the logical/metaphysical possibility of zombies forms part of his argument against physicalism. If you want, you can just stamp your foot down and insist on physicalism (and thereby dismiss whole swathes of the philosophical literature on consciousness), but from Chalmers' point of view you'd just be begging the important questions. My point regarding Dennett is that his overall picture of consciousness also contains highly counterintuitive elements (such as e.g. his denial of any form of privileged access [1], which is not just an ad-hoc speculation tacked on to his main theory but a necessary consequence of it). I agree that Chalmers' epiphenominalism is counterintuitive too. I don't think anyone has succeeded in arriving at an overall philosophical account of consciousness that is entirely satisfying and free of implausible or counterintuitive elements. I think it's important to have a certain amount of empathy here and understand that people genuinely differ in their plausibility judgments in this domain. For example, I personally find epiphenomenalism, though implausible, to be less implausible than the denial of privileged access; I suspect you have the inverse judgment. It is unclear how to weigh these sorts of considerations against each other. [1] > I see no other way to force this issue into the open than to defend an admittedly counterintuitive theory and await enlightenment on what, exactly, I have left out. The view that I wish to defend is that our privileged access extends to no images, sensations, impressions, raw feels, or phenomenal properties at all. There are indeed all sorts of interesting things going on in our heads that have characteristics or play roles that might tempt us to call them images or sensations or impressions, but our access to these events is not only not privileged; it is highly indirect, inferential and uncertain. https://link.springer.com/chapter/10.1007/978-94-009-9479-9_6 https://link.springer.com/chapter/10.1007/978-94-009-9479-9_...