Suppose FizzBuzz were a perfect proxy for programming ability. Some programmers are FizzBuzz-capable, and the rest are FizzBuzz-failures. Members of both grou

Suppose FizzBuzz were a perfect proxy for programming ability. Some programmers are FizzBuzz-capable, and the rest are FizzBuzz-failures. Members of both groups interview for jobs. A FB-capable programmer goes on three interviews, gets an offer, and works at his job for a couple of years. A FB-failure goes on three interviews, gets no offers (or if he gets an offer, gets fired shortly after), and goes on three more interviews the next week. The FB-capable average 1.3 interviews/year. The FB-failures average 150 interviews/year. (All numbers are total fabrications, of course.) There don't have to be a lot of FB-failures for them to represent 99% of interview candidates.