A biologist, a physicist and a mathematician were all drinking coffee and tea and observing a house across the street from them. They notice that two people walk into the house and then an hour later, three people walk out.
Physicist: An experimental error. Our first measurement was incorrect.
Biologist: No, they've obviously reproduced.
Mathematician: No, now when a one person enters the house, it'll be empty again.
|1||[made Community Wiki]|