The idea that a person is a functioning assembly of brain cells and associated molecules is not something neuroscience has discovered. It is, rather, something it takes for granted. You are your brain. Francis Crick once called this “the astonishing hypothesis,” because, as he claimed, it is so remote from the way most people alive today think about themselves. But what is really astonishing about this supposedly astonishing hypothesis is how astonishing it is not! The idea that there is a thing inside us that thinks and feels — and that we are that thing — is an old one. Descartes thought that the thinking thing inside had to be immaterial; he couldn’t conceive how flesh could perform the job. Scientists today suppose that it is the brain that is the thing inside us that thinks and feels. But the basic idea is the same. And this is not an idle point. However surprising it may seem, the fact is we don’t actually have a better understanding how the brain might produce consciousness than Descartes did of how the immaterial soul would accomplish this feat; after all, at the present time we lack even the rudimentary outlines of a neural theory of consciousness.Well, that would be "what I always say" if I were better at saying it than I actually am. You go, Professor Noë! Woo hoo! There's more, too, so ... you know what to do.
What we do know is that a healthy brain is necessary for normal mental life, and indeed, for any life at all. But of course much else is necessary for mental life. We need roughly normal bodies and a roughly normal environment. We also need the presence and availability of other people if we are to have anything like the sorts of lives that we know and value. So we really ought to say that it is the normally embodied, environmentally- and socially-situated human animal that thinks, feels, decides and is conscious. But once we say this, it would be simpler, and more accurate, to allow that it is people, not their brains, who think and feel and decide. It is people, not their brains, that make and enjoy art. You are not your brain, you are a living human being.
We need finally to break with the dogma that you are something inside of you — whether we think of this as the brain or an immaterial soul — and we need finally take seriously the possibility that the conscious mind is achieved by persons and other animals thanks to their dynamic exchange with the world around them (a dynamic exchange that no doubt depends on the brain, among other things). Importantly, to break with the Cartesian dogmas of contemporary neuroscience would not be to cave in and give up on a commitment to understanding ourselves as natural. It would be rather to rethink what a biologically adequate conception of our nature would be.
Sunday, December 04, 2011
Brian Leiter likes to pour scorn on the NY Times's philosophy blog The Stone (he really doesn't like Simon Critchley), but this post by Alva Noë is absolutely spot on. I can hardly decide which choice bits to put here in order to incite you to go over there and, as they say, read the whole thing. Let's try this one, which sounds very much like what I always say when this issue comes up (so naturally I like it):