Sally and her husband, Jack, have both been driving for three years. Jack has always driven very carefully. He has never been in an accident. Sally, however, has never been a good driver. She has already gotten into four accidents this year. Each time she has an accident, she claims that it was not her fault. Yesterday, Sally drove into a tree. She blamed it on the tree, saying that she honked the horn, but the tree didn't get out of the way....