BRAIN TWISTER #1
Acting on an anonymous tip, the police raid a house to arrest a suspect. They don't know what he looks like. All they know is that his name is John and that he is inside the house. The police bust in on a carpenter, a truck driver, a mechanic and a fireman playing poker. Without hesitation, they arrest the fireman.
How did they know they've got their man?
The fireman is the only man in the room. The rest of the poker players are women.