An ailing bookmaker sent his son to summon the doctor. Instead of the expected man, a stranger arrived. Later, the bookmaker asked for an explanation. “Well,” said the boy, “there were a lot of brass plates on the doors, and when I got to the one you told me to go to, it said, ‘Consultations, 10 to 1.’ The one next to it said, ‘9 to 1.’ And I knew you’d like the one who gave the best odds.”