The answer to this one is simple. Give a sentence that is neither true or false.
An example of this would be
"This sentence is false"
This is a paradox as if the sentence was true it would be false in which case it would be true etc..
You are neither right or wrong so they let you go.
YOU ARE READING
The little book of unsolvable riddles (the answer book)
Aléatoireplease don't cheat and actually have a crack at the puzzles before looking at the answer it makes it better for both of us.
