In which Dave, RJ and Sarah talk subtraction strategies, birth order effects, Bieber's redemption, and the spiritual dangers of courting controversy. But maybe that's just what a couple of oldest children (and one middle child) would discuss.

• Click here to read The Washington Post's report on our aversion to subtraction when it comes to problem solving.
• Click here to read Lynn Berger's article in Time on Birth Order.
• Click here to read Zach Baron's profile in GQ on The Redemption of Justin Bieber.
• Click here to read John Newton's letter on the dangers of courting controversy.