... faces. Suppose he had told them by his tones and insinuations that they were wrong Suppose that, by all the rules of logic, he had proved that they were wrong. What would have happened? More anger ... customers' opinions and treating them diplomatically and courteously will help beat the competition." You will never get into trouble by admitting that you may be wrong. That will stop all argument ... to admit that he, too, may be wrong. If you know positively that a person is wrong, and you bluntly tell him or her so, what happens? Let me illustrate. Mr. S a young New York attorney, once...