Why have we evolved with a capacity for reason? One answer might be because reason is a good way of getting at the truth, and truth is valuable for self-preservation. But reason is often fallible. It isn't on it's own a reliable route to truth. , who with , has researched this issue extensively, explores the question of why we have reason in this episode of the Philosophy Bites podcast. Their research suggests that reason has a social function. A pdf of Hugo Mercier and Dan Sperber's paper on why humans reason is available  from Dan Sperber',Badland Stew Blog;s website . Hugo Mercier provides a very useful overview of their research on the   (together with further links,Nike Air Max, including extensive press coverage). Philosophy Bites is made in association with the