Everyone lies. Even you and even me. We lie about small things and we lie about big things. We lie to help ourselves and we lie to protect others. Powerful people lie, all the way down to little kids telling fibs. Why do we do this if...

Behavioral economist Dan Ariely, the author of Predictably Irrational, uses classic visual illusions and his own counterintuitive (and sometimes shocking) research findings to show how we're not as rational as we think when we make...