I once had a conversation with a famous French philosopher who's a friend of mine. And I said to him, "Why the hell do you write so badly? Pourquoi tu écris si mal?" ... And this was Michel Foucault. He was a very smart guy and wrote a lot of very good stuff but in general he just wrote badly. When you heard him give a lecture in Berkeley, it was perfectly clear, just as clear as I am. ... And he said, "Well, in France, it would be regarded as somewhat childish and naive if you wrote clearly. ... In France you've got to have 10% incomprehensible."