Donald Trump’s statements about Muslims cheering after 9/11 are just the latest in a long record of false claims. But if Trump is the most recent, maybe most flamboyant, falsifier to enter US politics, he’s not the first and won’t be the last. OTM takes a look at political lies, including a taxonomy and history of political untruths; a psychological examination of how and why we lie; and whether, at the end of the day, the most damaging lies aren’t the ones we tell ourselves about our fellow citizens.

Discuss on Twitter: #OTMlies