We'd like to believe that we live during an enlightened age in which reason has vanquished the superstitions of old. But many of us also believe our horoscopes, get nervous when people open umbrellas indoors, or worry about jinxing things like sporting events and elections. According to Dr. Thomas D. Gilovich, our propensity to give credence to absurd ideas stems from an overload of information rather than a lack of it. Tonight, Gilovich, the author of How We Know What Isn't So and other books on judgment and decision-making, discusses how we make sense of our chaotic world by seeing things that aren't necessarily there, and accepting convenient falsities rather than complicated truths.