The Super Bowl is just a few days away, and sports axioms are rampant. But which are we to believe? Is the best defense a good offense? Or does defense win championships? In The New York Times Magazine this week, FiveThirtyEight’s Nate Silver looks at how the 20 best defenses and 20 best offenses to play in past Super Bowls fared in the big game, and what their records say about this year’s matchup between the Baltimore Ravens and the San Francisco 49ers. Read more.