Full Idea
The idea that there are mental representations is the idea that there are Ideas minus the idea that Ideas are images.
Clarification
'Ideas' (with a capital 'I') is the word as used in the eighteenth century
Gist of Idea
Mental representations are the old 'Ideas', but without images
Source
Jerry A. Fodor (Concepts:where cogn.science went wrong [1998], Ch.1)
Book Reference
Fodor,Jerry A.: 'Concepts: where cognitive science went wrong' [OUP 1998], p.8
A Reaction
Good for you, Fodor. I've always thought that the vociferous contempt with which modern philosphers refer to the old notion of 'Ideas' was grossly exaggerated. At last someone puts a clear finger on what seems to be the difficulty.