Raymond Smullyan. Alice in the country wit (№ 367364)

- Just so you know, my child, what if I decided to take you on an exam (note that I did not think to do that!), but if I still try to give you exam, I would ask you only questions that have no answer! Such issues are best, trust me!
- And what sense to ask questions that have no answer? - Alice asked.
- These are questions and make you think, ' said Humpty Dumpty.
- Think about what? - Alice asked.
- About what could be the answer! replied Humpty Dumpty.
- But you said yourself, if I thought of answers to these questions is no.
"No," confirmed Humpty Dumpty, and it is the most beautiful in them!