A common debate tactic where one party demands a form of proof that is inherently impossible to provide, given the nature of the claim or the constraints of reality. It's the moving goalpost equipped with rocket boosters—no matter what evidence you offer, the standard for "proof" shifts to something you cannot possibly produce. Requiring a video recording of the Big Bang, demanding a photograph of someone's internal experience, or asking for a controlled experiment on a unique historical event all qualify. The fallacy lies in pretending that because this impossible proof doesn't exist, the claim is therefore false or unsupported, when in fact the standard was rigged from the start.
Example: "She asked for a double-blind placebo-controlled trial of the effects of falling in love—a classic Fallacy of Impossible Proof designed to dismiss something real simply because it can't be lab-tested."
by Dumu The Void March 11, 2026
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