You Are Not So Smart: Why You Have Too Many Friends on Facebook, Why Your Memory Is Mostly Fiction, and 46 Other Ways You're Deluding Yourself

by David McRaney

The neuroscientist V. S. Ramachandran once encountered a split-brain patient whose left hemisphere believed in God, but whose right hemisphere was an atheist. Essentially, as he put it, there were two people in one body—two selves.