Why are self-confident ignoramuses so often believed? Why are thoughtful experts so often given the cold shoulder? And why do apparently irrelevant details such as a person’s height, their relative wealth, or their Facebook photo influence whether or not we trust what they are saying? In this episode we are joined by Stephen Martin and Joseph Marks, behavioural scientists and authors of Messengers: Who We Listen To, Who We Don't, And Why, in conversation with Helen Lewis of The Atlantic.  Support this show http://supporter.acast.com/intelligencesquared. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit podcastchoices.com/adchoices