Answer:
When is it bad luck to meet a white cat?
What is brown, big and red all over?
Why is a skeleton a bad liar?
Have you heard about the restaurant on the moon?
What's higher than the king?
If all Wibbles are Criggles, all Borkins are Kwumblins, no Hoggles are Borkins, and all Criggles are Borkins, is it true that all Borkins are Criggles?