adjective
showing disbelief or skepticism
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The scientist was incredulous at the results of the experiment, as they defied all known laws of physics.
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I was incredulous when I heard that she won the lottery twice in a row!
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When he told me he was going to climb Mount Everest without any training, I was like, incredulous much?
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Her incredulous laughter echoed through the room as she realized the absurdity of the situation.