Introduction
Why You Need This Book
Our bodies, including our brains, have remarkable similarities and striking differences. We have the same, fundamental physical structures—heart, mouth, neck, cerebral cortex, and so on. But I’m a lanky, red-headed male with big ears and beady eyes, and you’re probably not. Add religion, culture, education, and other non-physical characteristics to the distinctions between us, and you and I seem even more dissimilar. Could it be true, then, that we broadcast the same signals when we tell lies or feel stress? No, and yes. It’s not true that the eyes of all human beings wander off to the right when they’re lying, but some of them do. It’s not true that all people cross their arms when they don’t want someone ...

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