Full Idea
A psychology that can't make sense of such facts as that mental processes are typically truth-preserving is ipso facto dead in the water.
Gist of Idea
Psychology has to include the idea that mental processes are typically truth-preserving
Source
Jerry A. Fodor (The Elm and the Expert [1993], §1.3)
Book Reference
Fodor,Jerry A.: 'The Elm and the Expert' [MIT 1995], p.9