Jokes

Watched by a computer scientist, a biologist and a mathematician, a man and woman enter a house. A little later they see three people come out. The two scientists are each puzzled for a while but then the Computer Scientist suddenly looks really happy. She says "Ahh! there was a bug in the original counting algorithm - an initialization error". The biologist, also looking pleased with himself, exclaims "They must have reproduced". The mathematician however has been unperturbed by the whole thing and just remarks "If another person goes into the house, then the house will be empty."