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A form of proof bias where one demands evidence that is, in principle, impossible to provide—such as proof of a negative, absolute certainty, or evidence that would require violating the very phenomenon being studied. The goal is not to be convinced but to create an unattainable standard that ensures the opponent always fails. Impossible proof bias often appears in debates about historical events, subjective experience, or metaphysical claims: “prove you weren’t there,” “prove you’re not dreaming,” “prove God doesn’t exist.” It weaponizes the limits of human knowledge to dismiss any position the biased party wishes to reject.
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