Steven Pinker and Ken Dryden: "Where there's a way, there's a will"

Summary: When NHL legend Ken Dryden was about to publish his book, "Game Change", he got in touch with Harvard psychologist and linguist, Steven Pinker, who was about to publish "Enlightenment Now". Their common ground: what does it actually take to change someone's mind? The two talk to Paul Kennedy about the relationship of rhetoric and reason.