Full Idea
So-called 'homuncular functionalism' (such as Freud's or Plato's internal struggles of the soul) needn't lead to an infinite regress if eventually the homunculi become so stupid they could be replaced by a machine.
Clarification
'Homuncular' means 'involving little people inside the big person'
Gist of Idea
Homuncular functionalism (e.g. Freud) could be based on simpler mechanical processes
Source
Georges Rey (Contemporary Philosophy of Mind [1997], 7.2.2)
Book Reference
Rey,Georges: 'Contemporary Philosophy of Mind' [Blackwell 1997], p.195
A Reaction
from Fodor