It's not about what has been said, it's about what it means, and whether or not it makes any sense. Because the language used in discussing the so-called hard problem is ambiguous, my posts involve interpretation, therefore requiring quotes from Nagel that match what I've stated here in an effort to interpret the meaning is not a reasonable expectation. What's needed is to address the components of the argument as we've been discussing them:
What does it mean to make an "account of what it's like" to be something with consciousness, versus what does it mean to make an "accounting of" the parts, properties and operating principles of something with consciousness? The conclusion is that it's not possible to account for "what it's like" to be something in the same way we can account for "what it's made of " because the two kinds of "accounting" are entirely different.
In this discussion, the above conflict seems to be used as a rationale for arguing that consciousness isn't physical. However that logic is flawed: If question ( Q ) "Is consciousness physical?", is sufficiently addressed by answer ( A ), "Yes because ...", then the introduction of condition ( B ) " Does answer ( A ) explain what consciousness is like?" has no bearing on the validity of answer ( A ). It's an entirely separate question. All that we need to concern ourselves with is the initial question: "Is consciousness a physical phenomenon?" ( Yes or No ) and be able to provide sufficient evidence to support it. What "it's like" is irrelevant.
To press this further, is there any non-physical explanation that accounts for "what it's like" to be a conscious being? No. So either way the inclusion of this requirement is a dead end detour with respect to the question of whether or not consciousness is physical or non-physical, though it does make for interesting contemplation and investigation.
But the formulation of the hard problem mushes it together and claims that because the inventory of the parts doesn't explain how it works, the assembled unit will be incomplete. It's faulty logic.
I don't
require that you provide a quote - but you are saying that Nagel is making a specific claim and I don't see it in his paper, so it's reasonable to ask where Nagel says this -
In this discussion, the above conflict seems to be used as a rationale for arguing that consciousness isn't physical.
No, Nagel does not claim this:
"It would be a mistake to conclude that physicalism must be false. Nothing is proved by the inadequacy of physicalist hypotheses that assume a faulty objective analysis of mind. It would be truer to say that physicalism is a position we cannot understand because we do not at present have any conception of how it might be true. Perhaps it will be thought unreasonable to require such a conception as a condition of understanding. After all, it might be said, the meaning of physicalism is clear enough: mental states are states of the body; mental events are physical events. We do not know
which physical states and events they are, but that should not prevent us from understanding the hypothesis. What could be clearer than the words 'is' and 'are'?"
(but then read the next paragraph . . . )
Go back to the paper, the source material, whatever else has evolved in this discussion may well be muddled, but I re-read Nagel's paper this weekend and I don't think he needs any help from me, his argument is clear and coherent and regularly misunderstood- this link:
What is it like to be a bat?
addresses many of those misunderstandings and may be helpful - it seems to address some of your exact issues - it's worth quoting in full here for ease of reference:
agel's classic "What is it like to be a bat?"must be one of the most influential papers on consciousness of the last century, and it's still very relevant.
Nagel's aim is to launch a kind of counter-attack against physicalist arguments, which would reduce the mental to the merely physical, and which were evidently getting into the ascendant in 1974 when the paper was published. Tempting as it may be to fall back on the familiar kind of reductionist approach which has worked so well in other areas, Nagel argues, phenomenal, subjective experience is a special case. Reductive arguments always seek to give an explanation in objective terms, but the essential point about conscious experiences is that they are subjective. The whole idea of an objective account therefore makes no sense - no more sense than asking what my inward experiences are
really like, as opposed to how they seem to me. How they seem to me is all there is to them. Any neutral, objective, third-person explanation has to leave out the essence of the experience. The point about conscious experience is that
there is something it is like to see x, or hear y, or feel z.
Ah,
'there is something it is like' - the phrase that launched a thousand papers. Surely you realise that this is just an over-literal interpretation of the conventional phrase 'what is it like?'. To assume that the 'it' in that question represents a real thing rather than a grammatical quirk is just silly.
Yes, I understand
your point, but
Nagel's whole point is that 'what it's like' is strictly inexpressible in objective terms. So it isn't surprising that he has to resort to a back-handed way of getting you to see what he's talking about. If he could describe it straightforwardly, he'd be contradicting his own theory.
Anyway. Nagel uses the example of a bat to dramatise his case - how can we know what it is like to be a bat, from the inside?
There's a large rhetorical element in the choice of a bat. Bats have the traditional reputation of being a bit weird, and it's known that some of them have a sense we don't - echolocation. All this helps to persuade people that we can't imagine what things are like from another point of view. But if Nagel is right, it should be equally hard to see things from the point of view of an identical twin. So let's get the bats out of this particular belfry, OK?
Nagel's entitled to use any example he likes. He explains that he chose bats because they're close enough to human beings to leave most people in no doubt that they have conscious experiences of some kind, while far enough from us to dramatise his case. But whether you like it or not, it raises some fundamental issues. If Nagel is right, there are certain experiences - bat experiences, for example - that humans can never have. It follows that there are true facts about these experiences which humans can never grasp (although they can grasp that there must be facts of this kind. This general conclusion about the limits of human understanding must have been part of the inspiration for
Colin McGinn'swider theory that even human consciousness is ultimately beyond our understanding.
Yes, of course, since human beings are by definition not bats, they can't have the experience of being a bat. But it does not follow that there are facts about bat experiences they can't understand. You see, actually we
can know what it's like to be a bat. We can know what sizes of objects echolocation detects, and how the bat directs its ears and the stream of sound, and thousands of facts of that kind. We can know all about the kinds of information a bat's senses supply, and with the right equipment we can experience echolocation ourselves at least by proxy.
I think the worst part of the paper is where Nagel says that even if we imagine ourselves turning into a bat, that won't be any good. We're just imagining what it would be like for
us to be a bat, whereas we need to imagine what it's like
for a bat. This just reduces the whole thing to the trivial point that we can't stop being us. Because if we did - it wouldn't be us any more!
You just need to make the imaginative effort to see what he's on about. Actually, the claim being made is quite modest in some respects. Nagel himself says that his argument doesn't disprove physicalism. It would be nearer the truth to say that physicalism, the view that mental entities are physical entities, is a hypothesis we can't even understand properly...