When I was in kindergarten there was a classmate named John who was a very disagreeable sort. I really did not like him. Later, probably in first grade, a new student arrived named John. I immediately did not like him. After a few weeks it came to my attention that the new John had none of the bad attributes of the previous one and the question arose in my mind whether I had made an error. I realized that I disliked the new John because of his name. Even then I was loathe to give so simple a rule as “Jonhs are bad.”. Eventually I made friends with the new John but wondered how you were supposed to tell the difference between good Johns and bad Johns. The world had become more complex.