Full Idea
Across domains (such as biology and psychology) classes of physical objects, substances and events are typically represented by a prototype, by a set of exemplars, and by a theory.
Gist of Idea
The concepts for a class typically include prototypes, and exemplars, and theories
Source
Edouard Machery (Doing Without Concepts [2009], 3.2.3)
Book Reference
Machery,Edouard: 'Doing Without Concepts' [OUP 2009], p.61
A Reaction
In other words he thinks that all of the major psychological theories of concepts are partially correct, and he argues for extensive pluralism in the true picture. Bad news for neat philosophy, but real life is a right old mess.