Anubis does many things.Anubis approves.Anubis disapproves.Anubis blows chunks.

A physicist, a biologist, and a mathematician are walking past an empty, abandoned house. They see two people go into the house, and then sometime later three people emerge. The physicist says, "That's impossible!", the biologist says, "They must have reproduced." and the mathematician says "If someone else went in there that house would be empty again."