In some foreign country a priest, a lawyer and an engineer are about to be guillotined, The priest puts his head on the block; they pull the rope and nothing happens. He declares that he's been saved by divine intervention, so he's let go. The lawyer is put on the block, and again the rope doesn't release the-blade. He claims he can't be executed twice for the same crime, and he is set free too. They grab the engineer and shove his head into the guillotine. He looks up at the release. mechanism and says, "Wait a minute, I see your problem...".


A mathematician, a biologist and a physicist are sitting in a street cafe 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 people 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."