Do you trust people readily and quickly? How do you decide when to trust someone and when not to?

In the age of Fake News and post-truth, the common consensus is that human gullibility is playing an increasing role in how we live our lives and the decisions we collectively make. 

But how much should we believe and what is the extent of our trust? 

Hugo Mercier is Research Scientist at Le Centre National de la Recherche Scientifique (Paris) and Author of Not Born Yesterday: The Science of Who We Trust and What We Believe. He joins Jonathan to discuss.