Intuitions based on the first-person perspective can easily mislead us about what is and is not conceivable. This point is usually made in support of familiar reductionist positions on the mind-body problem, but I believe it can be detached from that approach. It seems to me that the powerful appearance of contingency in the relation between the functioning of the physical organism and the conscious mind -- an appearance that depends directly or indirectly on the firstperson perspective -- must be an illusion. But the denial of this contingency should not take theform of a reductionist account of consciousness of the usual type, whereby the logical gap between the mental and the physical is closed by conceptual analysis -- in effect, by analyzing the mental in terms of the physical (however elaborately this is done -- and I count functionalism as such a theory, along with the topic-neutral causal role analyses of mental concepts from which it descends).
In other words, I believe that there is a necessary connection in both directions between the physical and the mental, but that it cannot be discovered a priori. Opinion is strongly divided on the credibility of some kind of functionalist reductionism, and I won_t go through my reasons
for being on the antireductionist side of that debate. Despite significant attempts by a number of philosophers to describe the functional manifestations of conscious mental states, I continue to believe that no purely functionalist characterization of a system entails -- simply in virtue of our mental concepts -- that the system is conscious.
So I want to propose an alternative. In our present situation, when no one has a plausible answer to the mind-body problem, all we can really do is to try to develop various alternatives one of which may prove in the long run to be an ancestor of a credible solution. This is a plea for the project of searching for a solution that takes conscious points of view as logically irreducible to, but nevertheless necessarily connected with, the physical properties of the organisms whose points of view they are. Consciousness should be recognized as a conceptually irreducible aspect of reality that is necessarily connected with other equally irreducible aspects -- as electromagnetic fields are irreducible to but necessarily connected with the behavior of charged particles and gravitational fields with the behavior of masses, and vice versa. But the task of conceiving how a necessary connection might hold between the subjective and the physical cannot be accomplished by applying analogies from within physical science. This is a new ballgame. Yet I believe it is not irrational to hope that some day, long after we are all dead, people will be able to observe the operation of the brain and say, with true understanding, "That's what the experience of tasting chocolate looks like from the outside."
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My reading of the situation is that our inability to come up with an intelligible
conception of the relation between mind and body is a sign of the inadequacy of our present concepts, and that some development is needed.
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The causal argument for identification may make us believe that it is true, but it doesn't help us to understand it, and in my view, we really shouldn't believe it unless we can understand it.
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We do not at present possess the conceptual equipment to understand how subjective and physical features could both be essential aspects of a single entity or process.
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This does seem to call for some revision in our way of conceiving of mind, or matter, or both. The difficulty is to do this without denying what is in front of your nose. What we need is not a reductionist or eliminative revision but an expansionist one.
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We cannot regard pure supervenience as the end of the story because that would require the physical to necessitate the mental without there being any answer to the question how it does so. But there must be a how, and our task is to understand it.
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There is no hidden verbal contradiction in the description of a zombie -- even if in reality a zombie is logically impossible.
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Obviously we cannot will a new conceptual framework into existence. It has to result from trying to think, in light of the evidence, about the subject we want to understand, and devising concepts that do better justice to it than the ones we have. Considered as a form of revisionism rather than analysis, the physicalist-functionalist movement in philosophy of mind might be thought to have had a similar aim, but I believe it has failed because it is too conservative: It has tried to reinterpret mental concepts so as to make them tractable parts of the framework of physical science. What is needed instead is a search for something more unfamiliar, something which starts from the conceptual unintelligibility, in its present form, of the subjective-objective link.
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What will be the point of view, so to speak, of such a theory? If we could arrive at it, it would render transparent the relation between mental and physical, not directly, but through the transparency of their common relation to something that is not merely either of them.
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To summarize: The conjecture is essentially this: that even though no transparent and direct explanatory connection is possible between the physiological and the phenomenological, but only an empirically established extensional correlation, we may hope and ought to try as part of a scientific theory of mind to form a third conception that does directly entail both the mental and the physical, and through which their actual necessary connection with one another can therefore become transparent to us. Such a conception will have to be created; we won't just find it lying around.