More at http://philosophytalk.org/shows/schizophrenia-and-mind.

To be human, philosophers have often said, is to be rational. But many people, for biological reasons, are clearly not rational. Schizophrenia is not only a malady, it is also a window on how the human mind works, and what it means to be human. Ken and John examine schizophrenia and its lessons for philosophers with John Campbell from UC Berkeley, author of "Reference and Consciousness."