Argumentative Fallacies & Rhetorical Exchange

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Abstractions about defective and constructive moves in argument. They include appeals to force, popularity and authority, ad hominem and genetic attacks, repetition and loaded questions, false equivalence, shifting standards, concessions, two-sided messages, listening, and structured claim support.

20 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• Ad Baculum (Appeal to Force) — The fallacy of securing acceptance of a claim by threatening the listener rather than giving reasons bearing on its truth — a relevance error in which a payoff-altering signal is substituted for a truth-bearing one, so compliant assent and warranted belief come apart.
• Ad Hominem — Reject or discredit a claim by substituting an attack on its source — character, motives, circumstances, inconsistency, or affiliation — for evaluation of the claim and its evidence.
• Ad Nauseam (Argument from Repetition) — Diagnose the fallacy of treating a claim as established by bare repetition, where frequency raises felt credibility through processing fluency while adding zero new evidential warrant.
• Ad Populum (Appeal to the People) — Name the fallacy of treating a claim as established by its popularity, and expose the defect with one test — did the believers independently weigh the same evidence, or inherit the belief through a social channel? — that separates warranted aggregation from an influence cascade wearing the same clothes.
• Ad Verecundiam (Appeal to Authority) — The informal fallacy of treating a claim as established by an authority's credential under conditions where the citation carries no evidential weight — the credential being a signal that load-bearing conditions (domain competence, evidence access, disinterest, convergence) hold, used as though it guaranteed what it only heuristically suggests.
• Bulverism — Assume an opponent's conclusion is false, then explain the psychological or sociological cause of their 'error' — substituting a genetic account of the belief for the logical evaluation that was owed.
• Complex Question — Expose a question that smuggles a contested claim in as its presupposition, so every direct answer silently ratifies the claim and the only sound reply is to refuse the frame.
• Concession — Grant a peripheral or indefensible part of the opposing case while continuing to contest the rest, purchasing credibility through costly-looking admission and, if the granted claim was not load-bearing, harvesting narrowing, burden-shift, and board-clearing at once.
• False Equivalence — The fallacy of treating two things as comparably weighted on the dimension a judgment turns on, when they in fact differ by an order of magnitude or by kind — by highlighting a genuine shared feature and suppressing the difference that actually controls.
• Genetic Fallacy — Judge a claim, practice, object, or idea by source or origin information as though it settled present truth, validity, or merit, replacing the evaluation that is owed with an origin story not independently connected to the relevant criterion.
• Guilt by Association — Discredit a claim by the disreputable company it keeps — treating shared supporters, origins, or venues as a verdict on content — a relevance failure that lets no truth-value flow along co-occurrence edges without an independent causal or evidential link.
• Kettle logic — A defensive pattern in which an arguer offers several mutually contradictory defenses at once — each sufficient alone but jointly self-undermining — so the scatter is itself evidence that none is relied upon and the aim is deflection by volume, not vindication.
• Middle Ground Fallacy — Detect the error of concluding the truth must lie between two opposed positions merely because they are opposed — substituting a positional operation for an evidential one — by asking whether the midpoint keeps its credibility once one position is shown unsupported.
• Moralistic fallacy — Detect the inference that runs from normative undesirability straight to empirical falsity — 'this would be bad if true, therefore it is not so' — foreclosing a factual question on a moral ground without any evidence being weighed, the mirror of the naturalistic fallacy.
• Moving the goalposts — An argumentative pattern in which, on being shown evidence that meets a previously stipulated standard, one party revises the standard upward to block the conclusion rather than accept it — repeated so that no finite evidence can settle the question.
• Rhetorical Listening — Suspend rebuttal and parse another's discourse through three moves — what they claim as their stakes, what genuinely remains contested, and what your own position lets you hear — so an accurate hearing and a firm 'no' become compatible.
• Straw Man — Refute a weakened proxy of an opponent's view instead of the view they actually hold, so an apparent victory leaves the real position untouched.
• Toulmin Model — Decompose an informal argument into six named slots — claim, grounds, warrant, backing, qualifier, rebuttal — so evaluation becomes a completeness check that isolates the usually-implicit warrant, where almost every contested dispute actually lives.
• Tu Quoque — Catch the fallacy of rebutting a charge by alleging the accuser commits the same offence — substituting a verdict on the speaker's standing for a verdict on the speaker's claim — by asking whether the dispute was about a proposition's truth or the speaker's standing.
• Two-Sided Message — A persuasive communication that explicitly concedes an opposing argument alongside its advocacy, purchasing credibility with a costly concession — an advantage that holds only when credibility is the bottleneck and the audience is skeptical or already aware of the counter-argument.