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Lying is a normal part of human communication and is sometimes necessary to protect someone's feelings. At the same time, there are also malicious lies meant to deceive, cheat, and defraud. Especially in today's world, in which technology, media, and the government have blurred the lines between fact and fiction, you can't always rely on what comes out of someone's mouth or what you see on the internet or television. It doesn't take mind-reading superpowers to be able to tell when someone is lying -- but it does take special skills and a little practice. In How to Become a Human Shit Detector, international expert in undercover operations Dr. David Craig provides readers with an easy-to-follow guide on applying lie-detection skills to your everyday life.