Lying and Lie DetectionA foolproof guide both to lying and to detecting deception, Lying and Lie Detection: A CIA Insider's Guide will teach you how the pros can tell if and when somebody is lying. People lie all the time. Studies show that the average American lies between six and twenty times a day. Most lies are of the "little white" variety or are meant to spare a person's feelings. But what about the big lies? What about the consequential ones? You have a right to know