Most of what you do, think and believe is generated by parts of your brain to which you have no access. Sigmund Freud was the first to popularize this notion, asserting that only 5% or so of our thoughts and behavior is motivated by conscious intention. Now, 100 years later, the tools of brain science are able to document this in very specific detail. It turns out that we each have a multitude of inner selves, each responsible for different sorts of duties. Who is mad at who when you get angry at yourself? Who within you is determining what you find sexually attractive without your even knowing it? Where do your bright ideas and insights come from before you think of them? Why can your foot jump halfway to the brake pedal before you become consciously aware of danger ahead? Why do strippers make more money at certain times of month, even while no one is consciously aware of their fertility level? Is there a true Mel Gibson? What do Odysseus and the subprime mortgage meltdown have in common? How is your brain like a conflicted democracy engaged in civil war? Why are people whose name begins with J more likely to marry other people whose name begins with J? Why is it so difficult to keep a secret? Why did Supreme Court Justice William Douglas deny that he was paralyzed? These are the sorts of questions that have intrigued my guest, Dr. David Eagleman, a cutting-edge brain scientist at the Baylor College of Medicine. He was recently profiled in The New Yorker magazine and has a brilliant new book out titled, Incognito: The Secret Lives of The Brain.