Full Idea
If the Representational Theory of Mind is true, then concepts are constituents of beliefs, the units of semantic evaluation, a locus of causal interactions among mental representations, and formulas in Mentalese.
Gist of Idea
In the Representational view, concepts play the key linking role
Source
Jerry A. Fodor (LOT 2 [2008], Ch.2.1)
Book Reference
Fodor,Jerry A.: 'LOT 2: the Language of Thought Revisited' [OUP 2008], p.25
A Reaction
I like this aspect of the theory, but then I can't really think of a theory about how the mind works that doesn't make concepts central to it.