FILE - In this June 12, 2007, file photo, students learn to administer polygraph exams at the Latin American Polygraph Institute in Bogota, Colombia. Scientists say we all lie, and this year, politicians are bending the truth big time, with real consequences. By studying how and why we deceive, the experts say they can help us better understand the 2016 election season. (AP Photo/Fernando Vergara, File)

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