An intellectual offers a game to a fool:
- If I ask you a question and you don't know the answer, you give me $ 1. Conversely, if you ask me a question and I don't know the answer, I'll give you $ 100.
- Okay, the fool answers.

The intellectual begins:
- What has 4 legs that goes "meow"?
- Hey, said the idiot, who then pays $ 1.
- What is it that has 4 legs and goes "waf"?
- Hey, said the idiot, who then pays $ 1.

In turn, the fool asks him:
- What has 8 legs at noon and then 4 legs at night?

Surprised, the intellectual thinks for 10 minutes, then announces resigned:
- I really don't see ...
The intellectual then disbursed $ 100, and said to him:
- So what's the answer to the question?
- Hey, answers the idiot who gives him $ 1.