Riddle: A boy met someone on the street, the guy said ''If I tell you the exact time you were born, in the exact country, in the exact hospital, you give me $20, but if I get it wrong, you have to pay me $20.'' The boy had to pay the guy $20, why?
Answer: The guy told the truth, he said ''The exact time you were born, in the exact country, in the exact hospital''.