The Skeptic Editor Michael Marshall talks to Matthew Sweet about how we judge actions and truth. They're joined by New Generation Thinkers Elsa Richardson, who is a historian of the emotions at the University of Strathclyde working on a popular history of the gut-brain connection and digestion more widely, and Brendan McGeever, who teaches on sociology, racism and anti-semitism at Birkbeck, University of London.

Producer: Julian Siddle