As a broadcaster, Evan Davis has seen and heard it all, from Newsnight to Dragons' Den and Radio 4's Today programme. Join Evan in conversation with the Presiding Officer as they discuss his new book, 'Post-Truth: Why We Have Reached Peak Bullshit and What We Can Do About It', which provides a toolkit to handle the kinds of deceptions we encounter every day, and a route through the muddy waters of the post-truth age.