Where does the mind stop and the rest of the world begin? The
question invites two standard replies. Some accept the demarcations
of skin and skull, and say that what is outside the body is outside
the mind. Others are impressed by arguments suggesting that the
meaning of our words "just ain't in the head", and hold that this
externalism about meaning carries over into an externalism about mind.
We propose to pursue a third position. We advocate a very different
sort of externalism: an active externalism, based on the active role
of the environment in driving cognitive processes.