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Can you spot a liar? We all know people who think they can, and very often they claim to be able to do so by reading "body language." Clearing one's throat, touching one's mouth, crossing one's arms, looking away: these and other such gestures, they say, indicate on the part of the speaker a certain distance from the truth. In the WIRED "Tradecraft" video above, however former FBI special agent Joe Navarro more than once pronounces ideas about such physical lie indicators "nonsense." And having spent 25 years working to identify people presenting themselves falsely to the world — "my job was to catch spies," he says — he should know, at the very least, what isn't a tell.
