Proof by lack of evidence

The proof by lack of evidence fallacy is claiming something is true simply because nobody has yet given any evidence to the contrary.

Torturer: You are a heretic! You can't prove that you aren't one, so you are a heratic. Confess, or we will stretch your body out until you are a foot taller.

Accused: Ha, you did it - you committed the proof by lack of evidence fallacy!

Torturer: That's enough out of you. Brutus, give the wheel another turn.

by DonutLoverr May 28, 2024

proof day

April 11th is Proof Day, to honor the life of Deshaun "Proof" Holton.

paul: it's proof day, so lets pour one out for the homie, proof

by dajinco December 6, 2024

Proofshitpost

The aggressive, bad-faith demand for impossible or irrelevant levels of formal proof ("peer-reviewed studies only") to discredit an opponent's lived experience or a well-established social fact. The goal isn't to get proof, but to move the goalposts indefinitely, knowing the demand can't be met in the context, thereby declaring victory by default.

Proofshitpost Example: When presented with statistics and personal testimonies about systemic racism, a responder says, "I'll need a double-blind, controlled study where identical twins of different races apply for the same jobs, or this is just correlation. Until then, I don't believe you." This is proofshitposting—using an inappropriate standard of "proof" from hard science to invalidate social reality and halt discourse.

by Dumuabzu February 8, 2026

Proofpost

A specific, rigid standard of evidence that an arguer plants in the ground as the only acceptable form of validation for a claim. Unlike a simple goalpost, a proofpost is defined by its fetishization of a particular, often hyper-formal, type of proof—like demanding a peer-reviewed longitudinal study to acknowledge an anecdotal experience. It’s the initial, unreasonable demand for a specific kind of evidence that the opponent is unlikely to provide.

Proofpost Example: In a discussion about the emotional toll of gig work, someone states, “I’ll only accept proof in the form of a randomized control trial showing a causal link between app-based driving and clinical depression. Personal stories are just noise.” They’ve set a proofpost—an almost impossibly high and inappropriate bar—designed to invalidate the conversation from the start.

by Dumuabzu February 8, 2026

Proofgoalpost

The moment when the type of required evidence itself becomes the moving target. An arguer doesn't just move the goalpost for what will convince them; they shift the fundamental category of proof required (e.g., from statistics to personal testimony to historical documents and back), ensuring the debate remains forever about the rules of validation, not the substance.

Example:
Person A: “Here are crime statistics.”
Person B: “Statistics can be manipulated. I need a victim’s testimony.”
Person A: “Here’s a victim’s interview.”
Person B: “That’s just one emotional story. I need hard data.”
They aren’t engaging with evidence; they’re constantly moving the proofgoalpost.

by Dumuabzu February 8, 2026

Proofgoal

The elusive, often vaguely defined, piece of evidence that an arguer claims would settle the issue for them. It is presented as a reasonable target but is usually defined with such specificity or grandeur that it is practically unattainable, functioning more as a conversation-ender than a genuine objective.

Example: In a climate debate, someone says, “My proofgoal is a single, undeniable piece of evidence that 100% conclusively proves human activity is the sole cause of all warming, with zero margin for error or natural variation.” This “proofgoal” is a mythical, perfect piece of evidence whose impossibility is used to justify ongoing skepticism.

by Dumuabzu February 8, 2026

Proofbait

Proofbait, also Sourcebait, Evidencebait, Factbait, is a mix of proofpost and sciencebait that consists of demanding proof, sources, evidence, or facts not as a genuine request for information but as a bait tactic to provoke engagement, delay discussion, or derail argument. Proofbait is the rhetorical equivalent of "prove it" repeated endlessly, regardless of how much proof is provided. Each proof is met with a new demand—a different kind of proof, a more authoritative source, a more recent study, a more rigorous methodology. The goal is not to find truth but to exhaust the interlocutor, to make conversation so laborious that opponents give up. Proofbait is especially effective on platforms where appearing rational matters—the baiter looks like a reasonable skeptic, while the target exhausts themselves providing ever more evidence to someone who never intended to be convinced.

Example: "She provided a source for her claim. He proofbaited: 'That source is biased.' She provided a different source. 'That's too old.' Another source. 'That study has limitations.' Another. 'Can you find a meta-analysis?' After ten rounds, she realized the proof was never enough—proofbait had been the point. He wasn't seeking evidence; he was seeking exhaustion."

by Dumu The Void February 18, 2026