Do you think that everything you believe is true? If not, then what are you wrong about? It is a difficult question to answer, and it leads to many others. Where do our beliefs come from, and how do we know where we should place our doubt? Why don't facts seem to work on people? In this episode we explore the psychology of belief through interviews with Margaret Maitland, an Egyptologist, Jim Alcock, a psychologist who studies belief, and Will Storr, a journalist who wrote about his adventures with people who believe in things most people don't in his book, The Unpersuadables.