They see a man walk into the house. An hour later, two men walk out of the house.
The physicist says, "There must have been an error when measuring the number of people entering the house!"
The biologist says, "The man must have somehow reproduced!"
The mathematician says, "There are now -1 people in the house."
Many of the jokes are contributions from our users. If you find anything offensive and against our policy please report it here with a link to the page. We will do everything to make this an enjoyable platform for everyone.