“If a person makes a statement that you think is wrong—yes, even that you know is wrong—isn’t it better to begin by saying: “Well, now, look. I thought otherwise, but I may be wrong. I frequently am. And if I am wrong, I want to be put right. Let’s examine the facts.” There’s magic, positive magic, in such phrases as: “I may be wrong. I frequently am. Let’s examine the facts.”