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Supersizing the mind, or the extended mind thesis

These dualisms are all over the bloody shop, and a lot of people have a lot to say about such dilemmas as mind v. body; fact v. value; knowledge v. true belief; induction v. deduction; sensing v. perceiving; thinking v. behaving; denotation v. connotation; thought v. action; appearance v. reality.

Here is a reflection by David Chalmers on his iPhone, My iPhone is not my tool, or at least it is not wholly my tool. Parts of it have become parts of me . . . When parts of the environment are coupled to the brain in the right way, they become parts of the mind.

A blurring of mind/world here

Similarly, later on in the book, we’re invited to consider the cases of Otto and Inga, both of whom want to go to the museum. Inga remembers where it is and goes there; Otto has a notebook in which he has recorded the museum’s address. He consults the notebook, finds the address, and then goes on his way.

The suggestion is that there is no principled difference between the two cases: Otto’s notebook is (or may come with practice to serve as) an ‘external memory’, literally a ‘part of his mind’ that resides outside his body. Correspondingly, Otto’s consulting his notebook and Inga’s consulting her memory are, at least from the viewpoint of an enlightened cognitive scientist, both cognitive processes:
Such considerations of parity, once we put our bioprejudices aside, reveal the outward loop as a functional part of an extended cognitive machine. Such body-and-world involving cycles are best understood . . . as quite literally extending the machinery of mind out into the world – as building extended cognitive circuits that are themselves the minimal material bases for important aspects of human thought . . . Such cycles supersize the mind.

That’s pretty impressionistic; but unless I’ve missed it, there isn’t an exposition of EMT (extened mind thesis)  that is markedly less metaphorical in the book. So, could it be literally true that Chalmers’s iPhone and Otto’s notebook are parts of their respective minds? Come to think of it, do minds literally have parts? If so, do some minds have more parts than others? Roughly, how many parts would you say your mind has? (Notice that the answer mustn’t rely on assuming that your mind is your brain; brains are untendentiously of the inside; (like unarguably inside your skull) so if mind/brain identity is true, it follows that EMT is not.) Or, try this vignette: Inga asks Otto where the museum is; Otto consults his notebook and tells her. The notebook is thus part of an ‘external circuit’ that is part of Otto’s mind; and Otto’s mind (including the notebook) is part of an external circuit that is part of Inga’s mind. Now ‘part of’ is transitive: if A is part of B, and B is part of C, then A is part of C. So it looks as though the notebook that’s part of Otto’s mind is also part of Inga’s. So it looks as though if Otto loses his notebook, Inga loses part of her mind. Could that be literally true

 If minds don’t literally have parts, how can cognitive science literally endorse the claim that they do? That Juliet is the sun is, perhaps, figuratively true; but since it is only figuratively true, it’s of no astronomical interest

 Nothing happens in your mind when your iPhone rings (unless, of course, you happen to hear it do so). That’s not, however, because iPhones are ‘external’, it’s because iPhones don’t, literally and unmetaphorically, have contents. But what about an iPhone’s ringing? That means something; it means that someone is calling. And it happens on the outside by anybody’s standard. And similarly, what about Otto’s notebook? It has lots of content (it contains, for example, the phone numbers of lots of his friends); and it’s about something – it’s about, for example, his friends’ phone numbers. And also, come to think of it, what about iPhones that have had numbers programmed in? So, even if shovels and the like can’t be parts of minds, how does insisting on the intensionality of the mental rule out notebooks and iPhones?

Externalists and internalists share the assumption that representational states and processes (memories and beliefs, for example) play an essential role in cognition. Their disagreement is about where these representational states and processes reside. In Otto’s case, according to externalists, some of them are ‘outside’, in the notebook. That’s where he keeps, for example, his belief that the museum is on 53rd Street. But what about Inga? Suppose we agree, for the sake of argument, that what goes on in her case is that she stores her beliefs in her (internal) memory, which she ‘consults’ when she has a trip to the museum in mind. How does that work? Surely it’s not that Inga remembers that she remembers the address of the museum and, having consulted her memory of her memory then consults the memory she remembers having, and thus ends up at the museum

For one thing, as Clark rightly notices, your internal model of the world contains stuff that the world itself does not; this happens not just when your beliefs are false but also when they are hypothetical (‘if there are clouds, there will be rain’ can be true even if there aren’t any clouds); or when they are modal (‘it might rain’ can be true even if it doesn’t rain); or when they are in the past or future tense (‘it used to rain here a lot’ can be true even if it doesn’t rain here anymore).

There is a gap between the mind and the world, and (as far as anybody knows) you need to posit internal representations if you are to have a hope of getting across it. Mind the gap. You’ll regret it if you don’t.

Let’s start small. There is a documented case (from the University of California’s Institute for Nonlinear Science) of a California spiny lobster, one of whose neurons was deliberately damaged and replaced by a silicon circuit that restored the original functionality: in this case, the control of rhythmic chewing. Does Fodor believe that, despite the restored functionality, there is still something missing here? Probably, he thinks the control of chewing insufficiently ‘mental’ to count. But now imagine a case in which a person (call her Diva) suffers minor brain damage and loses the ability to perform a simple task of arithmetic division using only her neural resources. An external silicon circuit is added that restores the previous functionality. Diva can now divide just as before, only some small part of the work is distributed across the brain and the silicon circuit: a genuinely mental process (division) is supported by a hybrid bio-technological system. That alone, if you accept it, establishes the key principle of Supersizing the Mind. It is that non-biological resources, if hooked appropriately into processes running in the human brain, can form parts of larger circuits that count as genuinely cognitive in their own right.

source:

http://www.lrb.co.uk/v31/n03/jerry-fodor/where-is-my-mind

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