A.J. Jacobs cops to stoning adulterers: "I used pebbles"

A.J. Jacobs, who appeared last year at the IdeaFestival, followed up that appearance with this one for QTV, where he explains a bit about his life-as-experiment approach to writing.

Knowledge is a verb. That basic idea is indispensable, ironically, to one branch of philosophy - in robotics, where "embodied" intelligence offers context for decision making - to skilled craftspeople, whose experience lends them an intuitive understanding of the material at hand - and, of course, in many faith traditions. 

We know more than we can tell.