noun
the quality of being implausible; something that is unlikely or improbable
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The scientist pointed out the implausibility of the theory proposed by his colleague.
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I can't believe the implausibility of that excuse he came up with.
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The teacher called out the student for the implausibility of his story.
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The chances of winning the lottery are so low, it's almost like the implausibility of finding a needle in a haystack.