Full Idea
The two core ideas of the Theory Theory are that concepts are bodies of knowledge that underlie explanation, where explanation rests on folk examples, and concepts are organised in domains which use similar knowledge.
Gist of Idea
Theory Theory says concepts are explanatory knowledge, and concepts form domains
Source
Edouard Machery (Doing Without Concepts [2009], 4.4.1)
Book Reference
Machery,Edouard: 'Doing Without Concepts' [OUP 2009], p.103
A Reaction
Folk explanation is opposed to scientific explanation, as expounded by Hempel etc. This sounds better and better, since the domains reflect the structure of reality. Machery defends Theory Theory as part of the right answer, but it's my favourite bit.
Related Idea
Idea 18600 Theory Theory says category concepts are knowledge stores explaining membership [Machery]