But here’s the thing: You can do some things wrong and still succeed. The technical term here is dumb luck. A spacecraft with a design flaw can safely land on Mars where the conditions don’t trigger the flaw. A poorly shot soccer ball can end up in the goal if it ricochets off another player. A bad trial strategy can produce a win when the facts and the law are on your side. But success has a way of concealing these blunders. When we’re busy lighting cigars and popping champagne corks, we fail to account for the role that luck played in our triumph.