Full Idea
We need the idea of broad content to make sense of the fact that thoughts have the truth-conditions that they do.
Gist of Idea
Truth conditions require a broad concept of content
Source
Jerry A. Fodor (The Elm and the Expert [1993], §2.II)
Book Reference
Fodor,Jerry A.: 'The Elm and the Expert' [MIT 1995], p.50
A Reaction
There seems to be (as Dummett points out) a potential circularity here, as you can hardly know the truth-conditions of something if you don't already know its content.