If you, like me (and like David Weinberger, I was glad to learn) have had trouble understanding Lakoff’s Women, Fire & Dangerous Things, I suggest you listen to David’s podcast called Messiness is a virtue.
There is a terrific section in the middle about cognitive linguistics, aristotelian classification theory, prototype theory and basic level categories, all things I think are deeply important for IAs to know about.
And if you are insanely interested in this topic, get a copy of ‘Concepts: Core Readings‘. Dan Brown told me about it. It is a bit pricy, but it is a truly excellent book about cognitive linguistics and concepts. Still a hard-ish read, but very well-structured, with a great intro and the key works in the field.
I read an entire Plato essay at breakfast one day, which must be one of the oddest things I can say I have ever done.