A devoted colleague often asks me: “But what is your philosophy? Are you a monist, dualist, rationalist, idealist, a Kantian? Do you believe Plato was right? Do you think there is free will ?” He is amused by my answer that I do not know what any of those questions mean, that at least I am sufficiently uncertain to avoid venturing an answer. He smiles knowingly and says: “You won't tell.”