A mathematician, a physicist, an engineer went aga...

A mathematician, a physicist, an engineer went again to the races and laid their money down. Commiserating in the bar after the race, the engineer says, "I don`t understand why I lost all my money. I measured all the horses and calculated their strength and mechanical advantage and figured out how fast they could run..."The physicist interrupted him: "...but you didn`t take individual variations into account. I did a statistical analysis of their previous performances and bet on the horses with the highest probability of winning...""...so if you`re so hot why are you broke?" asked the engineer. But before the argument can grow, the mathematician takes out his pipe and they get a glimpse of his well-fattened wallet. Obviously here was a man who knows something about horses. They both demanded to know his secret."Well," he says, "first I assumed all the horses were identical and spherical..."