Do you really believe what you say and think you believe, and how can you know? The answer may at first brush appear obvious — “of course I believe what I say and think I do,” you might say. If you didn’t, after all, why would you be spending so much time engaged in the intellectual defense of it? This raises an interesting question: Can you believe that you believe something which you do not in fact believe in your heart? Is it possible that we deceive ourselves about what our own beliefs are?