Full Idea
Theory theorists deny that categorisation depends on similarity; they often propose that categorisation involves some kind of inference to the best explanation.
Gist of Idea
Theory theorists rely on best explanation, rather than on similarities
Source
Edouard Machery (Doing Without Concepts [2009], 6.5.1)
Book Reference
Machery,Edouard: 'Doing Without Concepts' [OUP 2009], p.183
A Reaction
Love it. Any theory of concepts should, in my view, be continuous with a plausible account of animal minds, and best explanations are not their strong suit. Maybe its explanations for slow categorising, and something else when it's quick.
Related Idea
Idea 18604 Are quick and slow categorisation the same process, or quite different? [Machery]