Full Idea
Certain thought experiments made trouble for standard functionalism, which limits input/output to the surface of an individual; proposals to extend this into the environment reduces the reliance on a computer paradigm, but increases complexity.
Gist of Idea
Broad concepts suggest an extension of the mind into the environment (less computer-like)
Source
Tyler Burge (Philosophy of Mind: 1950-2000 [2005], p.454)
Book Reference
Burge,Tyler: 'Foundations of the Mind' [OUP 2007], p.454
A Reaction
[He has the Twin Earth experiment in mind] The jury is out on this, but it looks a bit of a slippery slope. Accounts of action and responsibility need a fairly sharp concept of an individual. Externalism begins to look like just a new scepticism.