In a well-designed test, outcomes can’t be predetermined. You must be willing to fail. The test must run forward to shed light on uncertainty, rather than run backward to confirm preconceptions. Feynman said it best: “If it disagrees with experiment, it is wrong. In that simple statement is the key to science. It doesn’t make any difference how beautiful your guess is, it doesn’t make any difference how smart you are, who made the guess, or what his name is—if it disagrees with experiment, it’s wrong.”4
