Raymond Smullyan. Alice in the country wit (№ 170176)

- The Cheshire cat says, if everything is not here in your mind, ' said Alice. - Or is it?
- Of course not - reassured her Duchess. - Because if all there was out of his mind, and the Cheshire cat would be out of his mind, and his word could not be relied upon.
The remark of the Duchess Alice seemed quite reasonable.