“When Theodore Roosevelt was in the White House, he confessed that if he could be right 75 percent of the time, he would reach the highest measure of his expectation. If that was the highest rating that one of the most distinguished men of the twentieth century could hope to obtain, what about you and me? If you can be sure of being right only 55 percent of the time, you can go down to Wall Street and make a million dollars a day. If you can’t be sure of being right even 55 percent of the time, why should you tell other people they are wrong?”,Dale Carnegie, How to make friends and influence people (1936)