Moynihan puts everyone's truth-telling abilities to the test, literally, with a pop quiz experiment that reveals the biggest fibbers in the class. Uncertain how to navigate the treacherous course, members of the class begin forming tentative alliances. But can anyone be trusted in the Liars' Club?

How do we know when we're being lied to? In this week's History of Lying lecture, we'll discuss liars' tells and divining truth from fiction. Everyone wants to believe that their friends, family, and loved ones are trustworthy—but we also want to know how to spot deceit. Lecture by Simon Morales.