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This puzzle is from To Mock a Mockingbird goes like this -

There is a question I could ask that has a definite correct answer - yes or no - but it is logically impossible for you to give the correct answer. You might know what the correct answer is, but you cannot give it. Anybody other than you might possibly be able to give the correct answer, but you cannot!
Can you figure out what question I could have in mind?

I am not able to get anything out of this. Could you please help me out by suggesting some approach? I am not looking for solutions.

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If I remember correctly, I think this is the answer (or the question, or whatever, aaa...) from the book is...

"Is 'NO' your answer to this question?"

Explanation / Approach.

You have to find a self referential question that includes "Yes" or "No" in it. And ask the question in such a way that the answer contradicts itself.

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    $\begingroup$ Thanks, but I am more interested in hints rather than the answer itself (which is given in the book anyways). $\endgroup$
    – kusur
    Commented May 5, 2017 at 8:22
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    $\begingroup$ that's why I added an explanation. The answer is here for people that don't want to look for the book. $\endgroup$
    – Marius
    Commented May 5, 2017 at 8:24
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Hint:

The fact that anybody other than you might possibly be able to give the correct answer indicates that there's something special about your answer. So the question must specifically reference your answer.

Another hint:

It's a yes/no question, and both possible answers (yes/no) must lead to a contradiction.

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