A physicist, a biologist, a mathematician, and a computer scientist get coffee at a street cafe. A physicist, a biologist, a mathematician, and a computer scientist are sitting in a street cafe watching people entering and leaving the house on the other side of the street. First they see two people entering the house. Time passes. After a while they notice three people leaving the house. The physicist says, ""The measurement wasn't accurate."" The biologist says, ""They must have reproduced."" T…