A rhetorical and cognitive bias where one aggressively shifts the burden of proof onto the opposing side, demanding exhaustive evidence for every claim while providing none for their own assertions, and treating the failure to meet arbitrary standards as proof of falsehood. It often appears in online debates, where one party repeatedly demands “source?” without engaging with content, and after receiving sources, moves the goalposts or demands “higher quality” sources. The bias weaponizes the principle of burden of proof to avoid substantive argument, making the other side do all the work while the biased party remains in a position of unchallenged skepticism. It’s a favored tactic of bad-faith debaters and those with Laziness Bias.
Example: “He asked for a source on a basic historical fact, got a peer-reviewed paper, then said ‘that’s just one study’—Enforced Burden of Proof Bias, moving the goalposts forever.”
by Dumu The Void March 23, 2026
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