ily resemblance" category.

One paper I find very interesting on this subject is:

Pinker, Steven &amp; Prince, Alan (1999) "The nature of human concepts: evidence
from an unusual source", in the book "Language, Logic, and Concepts: Essays
in Memory of John Macnamara", edited by Jackendoff, Bloom &amp; Wynn, MIT Press.

This paper analyzes regular and irregular verb classes, in relation to
classical and family resemblance categories in cognitive psychology, and
argues that the parallels may not be accidenta