ABSTRACT
But isn’t this question itself one of the best we could ask? It has correct answers like What is the solution to world poverty? together with a statement of the solution (assuming, as we shall for the sake of argument, that there is one). So let us ask whether the answer
is a correct answer to Q. If it is a correct answer, its uselessness makes it an incorrect answer to Q. But if it is incorrect, all the correct answers will be so useful that this answer will be correct too. In other words, it is a correct answer if and only if it is not, a contradiction which makes the very question Q paradoxical.
