It's all in where you're coming from.Heh... Posted by DaveH at May 12, 2009 1:58 PM
A mathematician, a biologist and a physicist are sitting in a street caf� watching people going in and coming out of the house on the other side of the street. First they see two people going into the house. Time passes. After a while they notice three persons coming out of the house.
The physicist: "The measurement wasn't accurate."
The biologist: "They have reproduced."
The mathematician: "If now exactly one person enters the house then it will be empty again."