Appeal to Evidence

A fallacy where someone demands "evidence" in a way that assumes only certain kinds of evidence count, or where "evidence" is invoked as a magic word that ends discussion without specifying what evidence, from where, or why it's convincing. Often used to dismiss personal experience, testimonial knowledge, or qualitative research: "That's just anecdotal—where's the real evidence?" The fallacy lies in treating "evidence" as a unitary thing rather than a spectrum, and in using the demand for evidence as a way to dismiss rather than inquire.

"I shared my experience of discrimination. Response: 'Do you have evidence for that?' They meant: do you have video, documentation, witnesses? My experience wasn't evidence to them. That's Appeal to Evidence—using the word to dismiss what you've already decided doesn't count. Evidence is real; using it as a weapon is not."

by Dumu The Void February 28, 2026

Appeal to Logic

A fallacy where someone invokes "logic" as an authority to settle a question without specifying which logic, what logical system, or how it applies. "That's not logical!" becomes a catch-all dismissal. The appeal is fallacious when it treats logic as monolithic and self-evident, ignoring that there are multiple logical systems (classical, fuzzy, paraconsistent, etc.) and that applying logic requires interpretation. Often used to dismiss arguments that follow different logical rules or that address domains where formal logic isn't primary.

"Your argument about ethics doesn't follow classical logic, so it's invalid! That's Appeal to Logic—assuming your logic is the only logic. But ethical reasoning often uses different logics: care, narrative, casuistry. 'Not logical' often means 'not my logic.'"

by Dumu The Void February 28, 2026

Appeal to Rationality

A fallacy where someone invokes "rationality" as a self-evident standard that their position meets and yours doesn't, without specifying what rationality means or why their view is more rational. "Be rational!" becomes a way of saying "agree with me." The appeal is fallacious when it treats rationality as a fixed, universal property rather than a contested concept with multiple definitions and traditions. Often used to dismiss emotional, intuitive, or experiential ways of knowing as "irrational."

Appeal to Rationality "I tried to explain why I made a decision based on intuition and values. Response: 'Just be rational about it.' Translation: decide my way. That's Appeal to Rationality—using the word as a cudgel, not a concept. Rationality isn't one thing, and your version isn't the only version."

by Dumu The Void February 28, 2026

Appeal to Reason

Similar to Appeal to Rationality, but broader—invoking "reason" as the ultimate authority while assuming your position is the reasonable one. "Let's be reasonable" often means "let's agree with me." The fallacy lies in treating reason as a settled, singular standard that you possess and your opponent lacks. Reason is a capacity, not a conclusion; appealing to it doesn't settle arguments—it just claims the high ground.

"After I presented my case, they said: 'Can't we just be reasonable about this?' Translation: abandon your position and accept mine. That's Appeal to Reason—using the word to declare victory without argument. Reasonable people can disagree; 'be reasonable' is usually said by people who can't tolerate that."

by Dumu The Void February 28, 2026

Appeal to Validity

A fallacy where someone argues that because an argument is logically valid (if premises true, conclusion must follow), it must therefore be sound (premises actually true). Or more commonly, using "that's not valid" to dismiss arguments that don't fit classical logical forms. The appeal is fallacious when it confuses formal validity with truth, or when it treats validity as the only criterion for good argument. An argument can be perfectly valid and completely false if its premises are wrong.

"I made an argument based on probability and context. Response: 'That's not logically valid!' They meant it didn't fit syllogistic form. But probabilistic arguments aren't supposed to be deductively valid—they're supposed to be inductively strong. Appeal to Validity: judging all arguments by standards that only apply to some."

by Dumu The Void February 28, 2026

Appeal to Truth

A rhetorical fallacy where someone invokes "truth" as an authority to settle a question without specifying what truth means, whose truth, or how it applies. "I'm just interested in the truth" becomes a way of positioning oneself as objective while dismissing other views as biased. The fallacy lies in treating truth as a possession rather than a goal, as a club rather than a horizon. Everyone claims to seek truth; the claim doesn't settle anything. Appeal to Truth is argument from authority with truth as the authority—an authority that conveniently aligns with the speaker's position.

"I presented my perspective. Response: 'I'm just concerned with the truth, not your perspective.' That's Appeal to Truth—using the word as a weapon, not a goal. Truth isn't something you have and others lack; it's something we seek together. Claiming truth as your ally is just a way of declaring victory without argument."

by Dumu The Void February 28, 2026

Appeal to Reality

A rhetorical fallacy where someone invokes "reality" as an authority to settle a question without acknowledging that reality is interpreted, not given. "Get your head out of the clouds and face reality" becomes a way of dismissing alternative perspectives as unrealistic. The fallacy lies in treating one's own interpretation of reality as Reality Itself, with a capital R. But reality is mediated—through perception, through language, through culture, through theory. Appealing to reality as if it were unmediated is appealing to your own framework while pretending it's the only one.

"You think the system could be different? That's not realistic. Face reality." That's Appeal to Reality—treating your interpretation of what's possible as Reality Itself. But reality includes change, includes alternatives, includes possibility. 'Realistic' often means 'what I'm used to,' not 'what must be.' Appealing to reality is just appealing to your own assumptions dressed up as the way things are."

by Dumu The Void February 28, 2026