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If the proposition 'Men are honest' is taken to be false which of the following proposition/propositions can be claimed certainly to be true?

If the proposition 'Men are honest' is taken to be false which of the following proposition/propositions can be claimed certainly to be true? Correct Answer Some men are not honest

Since the given proposition, 'No men are honest' is false.  

To prove this proposition certainly false, we need at least some men to be not honest.

Only, Some men are not honest can be claims certainly true because it directly proves the given proposition wrong.

and Some not is also the part of No.

Hence, the correct answer is "Some men are not honest".

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