List of fallacies

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A fallacy is the use of invalid or otherwise faulty reasoning in the construction of an argument. All forms of human communication can contain fallacies.

Because of their variety, fallacies are challenging to classify. They can be classified by their structure (formal fallacies) or content (informal fallacies). Informal fallacies, the larger group, may then be subdivided into categories such as improper presumption, faulty generalization, error in assigning causation, and relevance, among others.

The use of fallacies is common when the speaker's goal of achieving common agreement is more important to them than utilizing sound reasoning. When fallacies are used, the premise should be recognized as not well-grounded, the conclusion as unproven (but not necessarily false), and the argument as unsound.<ref>Hornby, A. S. (2010). "sophist". Oxford Advanced Learner's Dictionary of Current English (8th ed.). Oxford University Press. ISBN 9780194799003.</ref>

Formal fallacies

Main article: Formal fallacy

A formal fallacy is an error in the argument's form.<ref name="FOOTNOTEBunninYu2004[httpwwwblackwellreferencecompublictocnodeidg9781405106795_chunk_g97814051067957_ss1-95 "formal fallacy"]">Bunnin & Yu 2004, "formal fallacy".</ref> All formal fallacies are types of non sequitur.

  • Appeal to probability – taking something for granted because it would probably be the case (or might possibly be the case).<ref>Bennett, Bo. "Appeal to possibility". Logically Fallacious. Retrieved 2023-03-17.</ref><ref>Carrier, Richard (2012). Proving History: Bayes's Theorem and the Quest for the Historical Jesus. Prometheus Books. p. 26-29. ISBN 9781616145590.</ref>
  • Argument from fallacy (also known as the fallacy fallacy) – the assumption that, if a particular argument for a "conclusion" is fallacious, then the conclusion by itself is false.<ref name="FOOTNOTECurtis[httpwwwfallacyfilesorgfallfallhtml "Fallacy Fallacy"]">Curtis, "Fallacy Fallacy".</ref>
  • Base rate fallacy – making a probability judgment based on conditional probabilities, without taking into account the effect of prior probabilities.<ref>"Base Rate Fallacy". Psychology Glossary. AlleyDog.com. Archived from the original on 2011-07-07. Retrieved 2011-02-01.</ref>
  • Conjunction fallacy – the assumption that an outcome simultaneously satisfying multiple conditions is more probable than an outcome satisfying a single one of them.<ref>Straker, David. "Conjunction Fallacy". ChangingMinds.org. Archived from the original on 2011-08-13. Retrieved 2011-02-01.</ref>
  • Non sequitur fallacy – where the conclusion does not logically follow the premise.<ref>Bennett, Bo. "Non Sequitur". logicallyfallacious. Archived from the original on 2022-07-01. Retrieved 2021-04-23.</ref>
  • Masked-man fallacy (illicit substitution of identicals) – the substitution of identical designators in a true statement can lead to a false one.<ref name="FOOTNOTECurtis[httpwwwfallacyfilesorgillisubshtml "The Masked Man Fallacy"]">Curtis, "The Masked Man Fallacy".</ref>

Propositional fallacies

A propositional fallacy is an error that concerns compound propositions. For a compound proposition to be true, the truth values of its constituent parts must satisfy the relevant logical connectives that occur in it (most commonly: [and], [or], [not], [only if], [if and only if]). The following fallacies involve relations whose truth values are not guaranteed and therefore not guaranteed to yield true conclusions.
Types of propositional fallacies:

Quantification fallacies

A quantification fallacy is an error in logic where the quantifiers of the premises are in contradiction to the quantifier of the conclusion.
Types of quantification fallacies:

  • Existential fallacy – an argument that has a universal premise and a particular conclusion.<ref name="FOOTNOTEWilson1999317">Wilson 1999, p. 317.</ref>

Formal syllogistic fallacies

Syllogistic fallacies – logical fallacies that occur in syllogisms.

  • Affirmative conclusion from a negative premise (illicit negative) – a categorical syllogism has a positive conclusion, but at least one negative premise.<ref name="FOOTNOTEWilson1999317">Wilson 1999, p. 317.</ref>
  • Fallacy of exclusive premises – a categorical syllogism that is invalid because both of its premises are negative.<ref name="FOOTNOTEWilson1999317">Wilson 1999, p. 317.</ref>
  • Fallacy of four terms (quaternio terminorum) – a categorical syllogism that has four terms.<ref name="FOOTNOTEPirie2006133–136">Pirie 2006, pp. 133–136.</ref>
  • Illicit major – a categorical syllogism that is invalid because its major term is not distributed in the major premise but distributed in the conclusion.<ref name="FOOTNOTEWilson1999317">Wilson 1999, p. 317.</ref>
  • Illicit minor – a categorical syllogism that is invalid because its minor term is not distributed in the minor premise but distributed in the conclusion.<ref name="FOOTNOTEWilson1999317">Wilson 1999, p. 317.</ref>
  • Negative conclusion from affirmative premises (illicit affirmative) – a categorical syllogism has a negative conclusion but affirmative premises.<ref name="FOOTNOTEWilson1999317">Wilson 1999, p. 317.</ref>
  • Fallacy of the undistributed middle – the middle term in a categorical syllogism is not distributed.<ref name="FOOTNOTEWilson1999316–317">Wilson 1999, pp. 316–317.</ref>
  • Modal fallacy – confusing necessity with sufficiency. A condition X is necessary for Y if X is required for even the possibility of Y. X does not bring about Y by itself, but if there is no X, there will be no Y. For example, oxygen is necessary for fire. But one cannot assume that everywhere there is oxygen, there is fire. A condition X is sufficient for Y if X, by itself, is enough to bring about Y. For example, riding the bus is a sufficient mode of transportation to get to work. But there are other modes of transportation – car, taxi, bicycle, walking – that can be used.
  • Modal scope fallacy – a degree of unwarranted necessity is placed in the conclusion.

Informal fallacies

Main article: Informal fallacy

Informal fallacies – arguments that are logically unsound for lack of well-grounded premises.<ref name="FOOTNOTEBunninYu2004[httpwwwblackwellreferencecompublictocnodeidg9781405106795_chunk_g978140510679510_ss1-120 "informal fallacy"]">Bunnin & Yu 2004, "informal fallacy".</ref>

  • Argument to moderation (false compromise, middle ground, fallacy of the mean, argumentum ad temperantiam) – assuming that a compromise between two positions is always correct.<ref name="FOOTNOTEDamer2009150">Damer 2009, p. 150.</ref>
  • Continuum fallacy (fallacy of the beard, line-drawing fallacy, sorites fallacy, fallacy of the heap, bald man fallacy, decision-point fallacy) – improperly rejecting a claim for being imprecise.<ref name="FOOTNOTEDowden2010[httpwwwieputmedufallacyLine-Drawing "Line-Drawing"]">Dowden 2010, "Line-Drawing".</ref>
  • Correlative-based fallacies
    • Suppressed correlative – a correlative is redefined so that one alternative is made impossible (e.g., "I'm not fat because I'm thinner than John.").<ref>Feinberg, Joel (2007). "Psychological Egoism". In Shafer-Landau, Russ (ed.). Ethical Theory: An Anthology. Blackwell Philosophy Anthologies. Wiley-Blackwell. p. 193. ISBN 9781405133203. Archived from the original on 2016-11-21. Retrieved 2016-10-04.</ref>
  • Definist fallacy – defining a term used in an argument in a biased manner (e.g., using "loaded terms"). The person making the argument expects that the listener will accept the provided definition, making the argument difficult to refute.<ref>Frankena, W. K. (October 1939). "The Naturalistic Fallacy". Mind. Oxford University Press. 48 (192): 464–477. doi:10.1093/mind/XLVIII.192.464. JSTOR 2250706.</ref>
  • Divine fallacy (argument from incredulity) – arguing that, because something is so incredible or amazing, it must be the result of superior, divine, alien or paranormal agency.<ref>Carroll, Robert T. "divine fallacy (argument from incredulity)". The Skeptic's Dictionary. Archived from the original on 10 April 2013. Retrieved 5 April 2013.</ref>
  • Double counting – counting events or occurrences more than once in probabilistic reasoning, which leads to the sum of the probabilities of all cases exceeding unity.
  • Equivocation – using a term with more than one meaning in a statement without specifying which meaning is intended.<ref name="FOOTNOTEDamer2009121">Damer 2009, p. 121.</ref>
    • Ambiguous middle term – using a middle term with multiple meanings.<ref name="FOOTNOTECopiCohen1990[httpsarchiveorgdetailsintroductiontol00copipage206 206–207]">Copi & Cohen 1990, pp. 206–207.</ref>
    • Definitional retreat – changing the meaning of a word when an objection is raised.<ref name="FOOTNOTEPirie200646">Pirie 2006, p. 46.</ref> Often paired with moving the goalposts (see below), as when an argument is challenged using a common definition of a term in the argument, and the arguer presents a different definition of the term and thereby demands different evidence to debunk the argument.
    • Motte-and-bailey fallacy – conflating two positions with similar properties, one modest and easy to defend (the "motte") and one more controversial (the "bailey").<ref>Zabel, Joseph (9 August 2017). "The Motte and the Bailey: A rhetorical strategy to know". heterodoxacademy.org. Archived from the original on 4 February 2020. Retrieved 30 January 2020.</ref> The arguer first states the controversial position, but when challenged, states that they are advancing the modest position.<ref name="mott-and-bailey">Shackel, Nicholas (2005). "The Vacuity of Postmodernist Methodology" (PDF). Metaphilosophy. 36 (3): 295–320. doi:10.1111/j.1467-9973.2005.00370.x. Archived (PDF) from the original on 2020-10-13. Retrieved 2020-09-06. For my purposes the desirable but only lightly defensible territory of the Motte and Bailey castle, that is to say, the Bailey, represents a philosophical doctrine or position with similar properties: desirable to its proponent but only lightly defensible. The Motte is the defensible but undesired position to which one retreats when hard pressed ...</ref><ref>Shackel, Nicholas (5 September 2014). "Motte and Bailey Doctrines". Practical Ethics: Ethics in the News. Cardiff University / University of Oxford. Archived from the original on 14 May 2019. Retrieved 23 May 2019. Some people have spoken of a Motte and Bailey Doctrine as being a fallacy and others of it being a matter of strategic equivocation. Strictly speaking, neither is correct.</ref>
    • Fallacy of accent – changing the meaning of a statement by not specifying on which word emphasis falls.
    • Persuasive definition – purporting to use the "true" or "commonly accepted" meaning of a term while, in reality, using an uncommon or altered definition.
    • (cf. the if-by-whiskey fallacy)
  • Ecological fallacy – inferring about the nature of an entity based solely upon aggregate statistics collected for the group to which that entity belongs.<ref name="FOOTNOTEFischer1970[httpsarchiveorgdetailshistoriansfallac0000fiscpage119 119–120]">Fischer 1970, pp. 119–120.</ref>
  • Etymological fallacy – assuming that the original or historical meaning of a word or phrase is necessarily similar to its actual present-day usage.<ref name="FOOTNOTEGula200270">Gula 2002, p. 70.</ref>
  • Fallacy of composition – assuming that something true of part of a whole must also be true of the whole.<ref name="FOOTNOTEPirie200631">Pirie 2006, p. 31.</ref>
  • Fallacy of division – assuming that something true of a composite thing must also be true of all or some of its parts.<ref name="FOOTNOTEPirie200653">Pirie 2006, p. 53.</ref>
  • False attribution – appealing to an irrelevant, unqualified, unidentified, biased or fabricated source in support of an argument.
    • Fallacy of quoting out of context (contextotomy, contextomy; quotation mining) – selective excerpting of words from their original context to distort the intended meaning.<ref name="FOOTNOTEGula200297">Gula 2002, p. 97.</ref>
  • False authority (single authority) – using an expert of dubious credentials or using only one opinion to promote a product or idea. Related to the appeal to authority.
  • False dilemma (false dichotomy, fallacy of bifurcation, black-or-white fallacy) – two alternative statements are given as the only possible options when, in reality, there are more.<ref>"Fallacy – False Dilemma". Nizkor. The Nizkor Project. Archived from the original on 2015-09-23. Retrieved 2011-02-01.</ref>
  • False equivalence – describing two or more statements as virtually equal when they are not.
  • Feedback fallacy – believing in the objectivity of an evaluation to be used as the basis for improvement without verifying that the source of the evaluation is a disinterested party.<ref>Marcus Buckingham; Ashley Goodall. "The Feedback Fallacy". Harvard Business Review. No. March–April 2019. Archived from the original on 2019-05-27. Retrieved 2019-03-11.</ref>
  • Historian's fallacy – assuming that decision-makers of the past had identical information as those subsequently analyzing the decision.<ref name="FOOTNOTEFischer1970[httpsarchiveorgdetailshistoriansfallac0000fiscpage209 209–213]">Fischer 1970, pp. 209–213.</ref> This is not to be confused with presentism, in which present-day ideas and perspectives are anachronistically projected into the past.
  • Historical fallacy – believing that certain results occurred only because a specific process was performed, though said process may actually be unrelated to the results.<ref>"The Reflex Arc Concept in Psychology", John Dewey, The Psychological Review, Vol. III. No. 4. July 1896. p. 367</ref>
    • Baconian fallacy – supposing that historians can obtain the "whole truth" via induction from individual pieces of historical evidence. The "whole truth" is defined as learning "something about everything", "everything about something", or "everything about everything". In reality, a historian "can only hope to know something about something".<ref name="FOOTNOTEFischer1970[httpsarchiveorgdetailshistoriansfallac0000fiscpage4 4–8]">Fischer 1970, pp. 4–8.</ref>
  • Homunculus fallacy – using a "middle-man" for explanation; this sometimes leads to regressive middle-men. It explains a concept in terms of the concept itself without explaining its real nature (e.g.: explaining thought as something produced by a little thinker – a homunculus – inside the head simply identifies an intermediary actor and does not explain the product or process of thinking).<ref name="FOOTNOTEBunninYu2004[httpswebarchiveorgweb20120113200604httpwwwblackwellreferencecompublictocnodequeryhomunculuswiden1result_number1book_idg9781405106795_9781405106795fromsearchfuzzy0typestdidg9781405106795_chunk_g97814051067959_ss1-77slop1 "Homunculus"]">Bunnin & Yu 2004, "Homunculus".</ref>
  • Inflation of conflict – arguing that, if experts in a field of knowledge disagree on a certain point within that field, no conclusion can be reached or that the legitimacy of that field of knowledge is questionable.<ref name="Fallacious Arguments">"A List Of Fallacious Arguments". Retrieved 6 October 2012.</ref><ref>Bennett, Bo. "Inflation of Conflict".</ref>
  • If-by-whiskey – an argument that supports both sides of an issue by using terms that are emotionally sensitive and ambiguous.
  • Incomplete comparison – insufficient information is provided to make a complete comparison.
  • Intentionality fallacy – the insistence that the ultimate meaning of an expression must be consistent with the intention of the person from whom the communication originated (e.g. a work of fiction that is widely received as a blatant allegory must necessarily not be regarded as such if the author intended it not to be so).<ref>Wimsatt, William K.; Beardsley, Monroe C. (1946). "The Intentional Fallacy". Sewanee Review. 54: 468–488. Revised and republished in Wimsatt, W.K. (1954). The Verbal Icon: Studies in the Meaning of Poetry. University Press of Kentucky. pp. 3–18. ISBN 0813128579. Archived from the original on December 21, 2023.</ref>
  • Kafkatrapping – a sophistical rhetorical device in which any denial by an accused person serves as evidence of guilt.<ref>McElroy, Wendy (14 August 2014). "Beware of Kafkatrapping". The Daily Bell. Archived from the original on 19 February 2018. Retrieved 18 February 2018.</ref><ref>Pardy, Bruce (26 June 2020). "Apocalyptic science: How the West is destroying itself". Financial Post. Archived from the original on 12 May 2022. Retrieved 1 July 2022.</ref><ref>Nattrass, Nicoli; Seekings, Jeremy (25 September 2020). "OPINIONISTA: UCT 'says no to non-racialism': A Freudian slip, or an embracing of the cult of 'anti-racism'?". Archived from the original on 2022-06-28. Retrieved 2022-07-01.</ref>
  • Kettle logic – using multiple, jointly inconsistent arguments to defend a position.
  • Ludic fallacy – failing to take into account that non-regulated random occurrences unknown unknowns can affect the probability of an event taking place.<ref>Taleb, Nassim (2007). The Black Swan. Random House. p. 309. ISBN 9781400063512. Archived from the original on 2016-11-21. Retrieved 2016-02-24.</ref>
  • Lump of labour fallacy – the misconception that there is a fixed amount of work to be done within an economy, which can be distributed to create more or fewer jobs.<ref>"Economics A–Z: terms beginning with L". The Economist. Archived from the original on 19 December 2016. Retrieved 21 December 2016.</ref>
  • McNamara fallacy (quantitative fallacy) – making an argument using only quantitative observations (measurements, statistical or numerical values) and discounting subjective information that focuses on quality (traits, features, or relationships).
  • Mind projection fallacy – assuming that a statement about an object describes an inherent property of the object, rather than a personal perception.
  • Moralistic fallacy – inferring factual conclusions from evaluative premises in violation of fact–value distinction (e.g.: inferring is from ought). Moralistic fallacy is the inverse of naturalistic fallacy.
  • Moving the goalposts (raising the bar) – argument in which evidence presented in response to a specific claim is dismissed and some other (often greater) evidence is demanded.
  • Nirvana fallacy (perfect-solution fallacy) – solutions to problems are rejected because they are not perfect.
  • Package deal – treating essentially dissimilar concepts as though they were essentially similar.
  • Proof by assertion – a proposition is repeatedly restated regardless of contradiction; sometimes confused with argument from repetition (argumentum ad infinitum, argumentum ad nauseam).
  • Prosecutor's fallacy – a low probability of false matches does not mean a low probability of some false match being found.
  • Proving too much – an argument that results in an overly generalized conclusion (e.g.: arguing that drinking alcohol is bad because in some instances it has led to spousal or child abuse).
  • Psychologist's fallacy – an observer presupposes the objectivity of their own perspective when analyzing a behavioral event.
  • Referential fallacy<ref>Semiotics Glossary R, Referential fallacy or illusion Archived 2018-07-26 at the Wayback Machine</ref> – assuming that all words refer to existing things and that the meaning of words reside within the things they refer to, as opposed to words possibly referring to no real object (e.g.: Pegasus) or that the meaning comes from how they are used (e.g.: "nobody" was in the room).
  • Reification (concretism, hypostatization, or the fallacy of misplaced concreteness) – treating an abstract belief or hypothetical construct as if it were a concrete, real event or physical entity (e.g.: saying that evolution selects which traits are passed on to future generations; evolution is not a conscious entity with agency).
  • Retrospective determinism – believing that, because an event has occurred under some circumstance, the circumstance must have made the event inevitable (e.g.: because someone won the lottery while wearing their lucky socks, wearing those socks made winning the lottery inevitable).
  • Slippery slope (thin edge of the wedge, camel's nose) – asserting that a proposed, relatively small, first action will inevitably lead to a chain of related events resulting in a significant and negative event and, therefore, should not be permitted.<ref name="FOOTNOTEWalton2008315">Walton 2008, p. 315.</ref>
  • Special pleading – the arguer attempts to cite something as an exemption to a generally accepted rule or principle without justifying the exemption (e.g.: an orphaned defendant who murdered their parents asking for leniency).

Improper premise

  • Begging the question (petitio principii) – using the conclusion of the argument in support of itself in a premise (e.g.: saying that smoking cigarettes is deadly because cigarettes can kill you; something that kills is deadly).<ref>"Fallacy: Begging the Question". nizkor.org. Archived from the original on 2019-03-10. Retrieved 2016-02-24.</ref><ref>"Begging the Question". txstate.edu. Archived from the original on 2015-09-28. Retrieved 2016-02-24.</ref>
    • Loaded label – while not inherently fallacious, the use of evocative terms to support a conclusion is a type of begging the question fallacy. When fallaciously used, the term's connotations are relied on to sway the argument towards a particular conclusion. For example, in an organic foods advertisement that says "Organic foods are safe and healthy foods grown without any pesticides, herbicides, or other unhealthy additives", the terms "safe" and "healthy" are used to fallaciously imply that non-organic foods are neither safe nor healthy.<ref>John D. Ramage; John C. Bean; June Johnson (2016). Writing Arguments: A Rhetoric with Readings, Concise Edition, MLA Update Edition. Pearson Education. p. 275. ISBN 9780134586496. Archived from the original on 2020-02-20. Retrieved 2018-04-03.</ref>
  • Circular reasoning (circulus in demonstrando) – the reasoner begins with what they are trying to end up with (e.g.: all bachelors are unmarried males).
  • Fallacy of many questions (complex question, fallacy of presuppositions, loaded question, plurium interrogationum) – someone asks a question that presupposes something that has not been proven or accepted by all the people involved. This fallacy is often used rhetorically so that the question limits direct replies to those that serve the questioner's agenda. (E.g., "Have you or have you not stopped beating your wife?".)

Faulty generalizations

Faulty generalization – reaching a conclusion from weak premises.

  • Accident – an exception to a generalization is ignored.<ref name="FOOTNOTEPirie20065">Pirie 2006, p. 5.</ref>
    • No true Scotsman – makes a generalization true by changing the generalization to exclude a counterexample.<ref name="FOOTNOTEFlew1984"No-true-Scotsman move"">Flew 1984, "No-true-Scotsman move".</ref>
  • Cherry picking (suppressed evidence, incomplete evidence, argument by half-truth, fallacy of exclusion, card stacking, slanting) – using individual cases or data that confirm a particular position, while ignoring related cases or data that may contradict that position.<ref name="FOOTNOTEHurley2007155">Hurley 2007, p. 155.</ref><ref>Bennett, Bo. "Cherry Picking". logicallyfallacious. Archived from the original on 2022-07-01.</ref>
    • Nut-picking (suppressed evidence, incomplete evidence) – using individual cases or data that falsify a particular position, while ignoring related cases or data that may support that position.
    • Survivorship bias – a small number of successes of a given process are actively promoted while completely ignoring a large number of failures.
  • False analogy – an argument by analogy in which the analogy is poorly suited.<ref name="FOOTNOTEDamer2009151">Damer 2009, p. 151.</ref>
  • Hasty generalization (fallacy of insufficient statistics, fallacy of insufficient sample, fallacy of the lonely fact, hasty induction, secundum quid, converse accident, jumping to conclusions) – basing a broad conclusion on a small or unrepresentative sample.<ref name="FOOTNOTEHurley2007134">Hurley 2007, p. 134.</ref>
  • Argument from anecdote – a fallacy where anecdotal evidence is presented as an argument; without any other contributory evidence or reasoning.
  • Inductive fallacy – a more general name for a class of fallacies, including hasty generalization and its relatives. A fallacy of induction happens when a conclusion is drawn from premises that only lightly support it.
  • Misleading vividness – involves describing an occurrence in vivid detail, even if it is an exceptional occurrence, to convince someone that it is more important; this also relies on the appeal to emotion fallacy.
  • Overwhelming exception – an accurate generalization that comes with qualifications that eliminate so many cases that what remains is much less impressive than the initial statement might have led one to assume.<ref name="FOOTNOTEFischer1970[httpsarchiveorgdetailshistoriansfallac0000fiscpage127 127]">Fischer 1970, p. 127.</ref>
  • Thought-terminating cliché – a commonly used phrase, sometimes passing as folk wisdom, used to quell cognitive dissonance, conceal lack of forethought, move on to other topics, etc. – but in any case, to end the debate with a cliché rather than a point.

Questionable cause

Questionable cause is a general type of error with many variants. Its primary basis is the confusion of association with causation, either by inappropriately deducing (or rejecting) causation or a broader failure to properly investigate the cause of an observed effect.

  • Cum hoc ergo propter hoc (Latin for 'with this, therefore because of this'; correlation implies causation; faulty cause/effect, coincidental correlation, correlation without causation) – a faulty assumption that, because there is a correlation between two variables, one caused the other.<ref name="FOOTNOTEPirie200641">Pirie 2006, p. 41.</ref>
    • Post hoc ergo propter hoc (Latin for 'after this, therefore because of this'; temporal sequence implies causation) – X happened, then Y happened; therefore X caused Y.<ref name="FOOTNOTEDamer2009180">Damer 2009, p. 180.</ref>
    • Wrong direction (reverse causation) – cause and effect are reversed. The cause is said to be the effect and vice versa.<ref name="FOOTNOTEGula2002135">Gula 2002, p. 135.</ref> The consequence of the phenomenon is claimed to be its root cause.
    • Ignoring a common cause
  • Fallacy of the single cause (causal oversimplification<ref name="FOOTNOTEDamer2009178">Damer 2009, p. 178.</ref>) – it is assumed that there is one, simple cause of an outcome when in reality it may have been caused by a number of only jointly sufficient causes.
  • Furtive fallacy – outcomes are asserted to have been caused by the malfeasance of decision makers.
  • Magical thinking – fallacious attribution of causal relationships between actions and events. In anthropology, it refers primarily to cultural beliefs that ritual, prayer, sacrifice, and taboos will produce specific supernatural consequences. In psychology, it refers to an irrational belief that thoughts by themselves can affect the world or that thinking something corresponds with doing it.

Statistical fallacies

  • Regression fallacy – ascribes cause where none exists. The flaw is failing to account for natural fluctuations. It is frequently a special kind of post hoc fallacy.
  • Gambler's fallacy – the incorrect belief that separate, independent events can affect the likelihood of another random event. If a fair coin lands on heads 10 times in a row, the belief that it is "due to the number of times it had previously landed on tails" is incorrect.<ref name="FOOTNOTEDamer2009186">Damer 2009, p. 186.</ref>
    • Inverse gambler's fallacy – the inverse of the gambler's fallacy. It is the incorrect belief that on the basis of an unlikely outcome, the process must have happened many times before.
  • p-hacking – belief in the significance of a result, not realizing that multiple comparisons or experiments have been run and only the most significant were published
  • Garden of forking paths fallacy – incorrect belief that a single experiment can not be subject to the multiple comparisons effect.

Relevance fallacies

Red herring fallacies

A red herring fallacy, one of the main subtypes of fallacies of relevance, is an error in logic where a proposition is, or is intended to be, misleading in order to make irrelevant or false inferences. This includes any logical inference based on fake arguments, intended to replace the lack of real arguments or to replace implicitly the subject of the discussion.<ref>Gary Curtis. "Logical Fallacy: Red Herring". fallacyfiles.org. Archived from the original on 2016-03-03. Retrieved 2016-02-24.</ref><ref>"Logical Fallacies". logicalfallacies.info. Archived from the original on 2016-02-21. Retrieved 2016-02-24.</ref>

Red herring – introducing a second argument in response to the first argument that is irrelevant and draws attention away from the original topic (e.g.: saying "If you want to complain about the dishes I leave in the sink, what about the dirty clothes you leave in the bathroom?").<ref name="FOOTNOTEDamer2009208">Damer 2009, p. 208.</ref> In jury trial, it is known as a Chewbacca defense. In political strategy, it is called a dead cat strategy. See also irrelevant conclusion.

  • Ad hominem – attacking the arguer instead of the argument. (Note that "ad hominem" can also refer to the dialectical strategy of arguing on the basis of the opponent's own commitments. This type of ad hominem is not a fallacy.)
    • Circumstantial ad hominem – stating that the arguer's personal situation or perceived benefit from advancing a conclusion means that their conclusion is wrong.<ref>Nizkor. "Circumstantial Ad Hominem". Archived from the original on July 13, 2015. Retrieved September 5, 2018.</ref>
    • Poisoning the well – a subtype of ad hominem presenting adverse information about a target person with the intention of discrediting everything that the target person says.<ref name="FOOTNOTEWalton2008187">Walton 2008, p. 187.</ref>
    • Appeal to motive – dismissing an idea by questioning the motives of its proposer.
    • Tone policing – focusing on emotion behind (or resulting from) a message rather than the message itself as a discrediting tactic.
    • Traitorous critic fallacy (ergo decedo, 'therefore I leave') – a critic's perceived affiliation is portrayed as the underlying reason for the criticism and the critic is asked to stay away from the issue altogether. Easily confused with the association fallacy (guilt by association) below.
  • Appeal to authority (argument from authority, argumentum ad verecundiam) – an assertion is deemed true because of the position or authority of the person asserting it.<ref name="FOOTNOTEClarkClark200513–16">Clark & Clark 2005, pp. 13–16.</ref><ref name="FOOTNOTEWalton199728">Walton 1997, p. 28.</ref>
    • Appeal to accomplishment – an assertion is deemed true or false based on the accomplishments of the proposer. This may often also have elements of appeal to emotion see below.
    • Courtier's reply – a criticism is dismissed by claiming that the critic lacks sufficient knowledge, credentials, or training to credibly comment on the subject matter.
  • Appeal to consequences (argumentum ad consequentiam) – the conclusion is supported by a premise that asserts positive or negative consequences from some course of action in an attempt to distract from the initial discussion.<ref name="FOOTNOTEWalton200827">Walton 2008, p. 27.</ref>
  • Appeal to emotion – manipulating the emotions of the listener rather than using valid reasoning to obtain common agreement.<ref name="FOOTNOTEDamer2009111">Damer 2009, p. 111.</ref>
    • Appeal to fear – generating distress, anxiety, cynicism, or prejudice towards the opponent in an argument.<ref>"Appeal to Fear". changingminds.org. Archived from the original on 2014-02-22. Retrieved 2014-02-11.</ref>
    • Appeal to flattery – using excessive or insincere praise to obtain common agreement.<ref name="FOOTNOTEGula200212">Gula 2002, p. 12.</ref>
    • Appeal to pity (argumentum ad misericordiam) – generating feelings of sympathy or mercy in the listener to obtain common agreement.<ref name="FOOTNOTEWalton2008128">Walton 2008, p. 128.</ref>
    • Appeal to ridicule (reductio ad ridiculum, reductio ad absurdum, ad absurdum) – mocking or stating that the opponent's position is laughable to deflect from the merits of the opponent's argument. (Note that "reductio ad absurdum" can also refer to the classic form of argument that establishes a claim by showing that the opposite scenario would lead to absurdity or contradiction. This type of reductio ad absurdum is not a fallacy.)<ref>"Appeal to Ridicule". changingminds.org. Archived from the original on 2014-02-22. Retrieved 2014-02-11.</ref>
    • Appeal to spite – generating bitterness or hostility in the listener toward an opponent in an argument.<ref>"Appeal to Spite". changingminds.org. Archived from the original on 2014-02-22. Retrieved 2014-02-11.</ref>
    • Judgmental language – using insulting or pejorative language in an argument.
    • Pooh-pooh – stating that an opponent's argument is unworthy of consideration.<ref>Munson, Ronald; Black, Andrew (2016). The Elements of Reasoning. Cengage Learning. p. 257. ISBN 9781305886834. Archived from the original on 2016-01-18. Retrieved 2015-11-13.</ref>
    • Style over substance – embellishing an argument with compelling language, exploiting a bias towards the esthetic qualities of an argument, e.g. the rhyme-as-reason effect<ref>Bennett, Bo. "Style over Substance". logicallyfallacious. Retrieved 2022-07-06.</ref>
    • Wishful thinking – arguing for a course of action by the listener according to what might be pleasing to imagine rather than according to evidence or reason.<ref name="FOOTNOTEDamer2009146">Damer 2009, p. 146.</ref>
  • Appeal to nature – judgment is based solely on whether the subject of judgment is 'natural' or 'unnatural'.<ref name="fallacyfiles.org">Gary Curtis. "Logical Fallacy: Appeal to Nature". fallacyfiles.org. Archived from the original on 2015-09-24. Retrieved 2014-02-11.</ref> (Sometimes also called the "naturalistic fallacy", but is not to be confused with the other fallacies by that name.)
  • Appeal to novelty (argumentum novitatis, argumentum ad antiquitatis) – a proposal is claimed to be superior or better solely because it is new or modern.<ref name="FOOTNOTEPirie2006116">Pirie 2006, p. 116.</ref> (opposite of appeal to tradition)
  • Appeal to poverty (argumentum ad Lazarum) – supporting a conclusion because the arguer is poor (or refuting because the arguer is wealthy). (Opposite of appeal to wealth.)<ref name="FOOTNOTEPirie2006104">Pirie 2006, p. 104.</ref>
  • Appeal to tradition (argumentum ad antiquitatem) – a conclusion supported solely because it has long been held to be true.<ref name="FOOTNOTEPirie200614">Pirie 2006, p. 14.</ref>
  • Appeal to wealth (argumentum ad crumenam) – supporting a conclusion because the arguer is wealthy (or refuting because the arguer is poor).<ref name="FOOTNOTEPirie200639">Pirie 2006, p. 39.</ref> (Sometimes taken together with the appeal to poverty as a general appeal to the arguer's financial situation.)
  • Argumentum ad baculum (appeal to the stick, appeal to force, appeal to threat) – an argument made through coercion or threats of force to support position.<ref name="FOOTNOTEDamer2009106">Damer 2009, p. 106.</ref>
  • Argumentum ad populum (appeal to widespread belief, bandwagon argument, appeal to the majority, appeal to the people) – a proposition is claimed to be true or good solely because a majority or many people believe it to be so.<ref name="Widespread Belief">"Appeal to Widespread Belief". Archived from the original on 13 June 2011. Retrieved 6 October 2012.</ref>
  • Association fallacy (guilt by association and honor by association) – arguing that because two things share (or are implied to share) some property, they are the same.<ref>Gary Curtis. "Logical Fallacy: Guilt by Association". fallacyfiles.org. Archived from the original on 2019-06-05. Retrieved 2014-02-11.</ref>
  • Logic chopping fallacy (nit-picking, trivial objections) – Focusing on trivial details of an argument, rather than the main point of the argumentation.<ref>Bennett, Bo. "Logic Chopping". LogicallyFallacious. Archived from the original on 2022-07-01. Retrieved 2021-05-29.</ref><ref>Byerly, Henry (1973). A primer of logic. Harper & Row. ISBN 0060411139.</ref>
  • Ipse dixit (bare assertion fallacy) – a claim that is presented as true without support, as self-evidently true, or as dogmatically true. This fallacy relies on the implied expertise of the speaker or on an unstated truism.<ref>Whitney, William Dwight; Smith, Benjamin Eli, eds. (1897). The Century Dictionary and Cyclopedia. Vol. IV. New York: The Century Co. pp. 3179–3180. Archived from the original on December 21, 2023. Retrieved December 21, 2023.</ref><ref>Westbrook, Robert B. (1991). John Dewey and American Democracy. Cornell University Press. p. 359. ISBN 978-0-8014-8111-6.</ref><ref name="comp">VanderMey, Randall; Meyer, Verne; Van Rys, John; Sebranek, Patrick (2012). COMP. Cengage Learning. ISBN 9781133307747. Archived from the original on 2021-10-16. Retrieved 2017-12-12. Bare assertion. The most basic way to distort an issue is to deny that it exists. This fallacy claims, 'That's just how it is.'</ref>
  • Bulverism (psychogenetic fallacy) – inferring why an argument is being used, associating it to some psychological reason, then assuming it is invalid as a result. The assumption that if the origin of an idea comes from a biased mind, then the idea itself must also be a falsehood.<ref name="Fallacious Arguments" />
  • Chronological snobbery – a thesis is deemed incorrect because it was commonly held when something else, known to be false, was also commonly held.<ref>"Encyclopedia Barfieldiana". davidlavery.net. Archived from the original on 2013-05-20. Retrieved 2014-02-11.</ref><ref>"Chronological snobbery – Summa Bergania". Archived from the original on February 5, 2012. Retrieved February 11, 2014.</ref>
  • Fallacy of relative privation (also known as "appeal to worse problems" or "not as bad as") – dismissing an argument or complaint due to what are perceived to be more important problems. First World problems are a subset of this fallacy.<ref>Turkel, Bruce (2016). All about Them: Grow Your Business by Focusing on Others. Da Capo Press. ISBN 9780738219202. Archived from the original on 5 August 2021. Retrieved 15 November 2020 – via Google Books.</ref><ref>Bennett, Bo. "Relative privation". Archived from the original on 2019-11-05. Retrieved 2019-12-30 – via Logically Fallacious.</ref>
  • Genetic fallacy – a conclusion is suggested based solely on something or someone's origin rather than its current meaning or context.<ref name="FOOTNOTEDamer200993">Damer 2009, p. 93.</ref>
  • I'm entitled to my opinion – a person discredits any opposition by claiming that they are entitled to their opinion.
  • Moralistic fallacy – inferring factual conclusions from evaluative premises, in violation of fact-value distinction; e.g. making statements about what is, on the basis of claims about what ought to be. This is the inverse of the naturalistic fallacy.
  • Naturalistic fallacy – inferring evaluative conclusions from purely factual premises<ref name="FOOTNOTEDowden2010[httpwwwieputmedufallacyNaturalistic "Naturalistic"]">Dowden 2010, "Naturalistic".</ref><ref name="nat-fal">"Naturalistic fallacy". TheFreeDictionary.com. Archived from the original on 2013-06-04. Retrieved 2013-07-01.</ref> in violation of fact-value distinction. Naturalistic fallacy (sometimes confused with appeal to nature) is the inverse of moralistic fallacy.
    • Is–ought fallacy<ref name="FOOTNOTEDowden2010[httpwwwieputmedufallacyIs-Ought "Is-Ought"]">Dowden 2010, "Is-Ought".</ref> – deduce a conclusion about what ought to be, on the basis of what is.
  • Naturalistic fallacy fallacy<ref>Searle, John R. (January 1964). "How to Derive "Ought" From "Is"". The Philosophical Review. 73 (1): 43–58. doi:10.2307/2183201. ISSN 0031-8108. JSTOR 2183201. Archived from the original on 2017-02-07. Retrieved 2017-09-03.</ref> (anti-naturalistic fallacy)<ref>Walter, Alex (2006). "The Anti-naturalistic Fallacy: Evolutionary Moral Psychology and the Insistence of Brute Facts". Evolutionary Psychology. 4 (1): 34–48. doi:10.1177/147470490600400102. ISSN 1474-7049.</ref> – inferring an impossibility to infer any instance of ought from is from the general invalidity of is-ought fallacy, mentioned above. For instance, is <math>P \lor \neg P</math> does imply ought <math>P \lor \neg P</math> for any proposition <math>P</math>, although the naturalistic fallacy fallacy would falsely declare such an inference invalid. Naturalistic fallacy fallacy is a type of argument from fallacy.
  • Straw man fallacy – refuting an argument different from the one actually under discussion, while not recognizing or acknowledging the distinction.<ref name="Stephen Downes">Downes, Stephen. "The Logical Fallacies". Archived from the original on 3 March 2016. Retrieved 25 February 2016.</ref>
  • Texas sharpshooter fallacy – improperly asserting a cause to explain a cluster of data.<ref name="FOOTNOTECurtis[httpwwwfallacyfilesorgtexsharphtml "The Texas Sharpshooter Fallacy"]">Curtis, "The Texas Sharpshooter Fallacy".</ref>
  • Tu quoque ('you too' – appeal to hypocrisy, whataboutism) – stating that a position is false, wrong, or should be disregarded because its proponent fails to act consistently in accordance with it.<ref name="FOOTNOTEPirie2006164">Pirie 2006, p. 164.</ref>
  • Two wrongs make a right – assuming that, if one wrong is committed, another wrong will rectify it.<ref name="FOOTNOTEJohnsonBlair1994122">Johnson & Blair 1994, p. 122.</ref>
  • Vacuous truth – a claim that is technically true but meaningless, in the form no A in B has C, when there is no A in B. For example, claiming that no mobile phones in the room are on when there are no mobile phones in the room.

See also

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References

Citations

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Sources

Further reading

The following is a sample of books for further reading, selected for a combination of content, ease of access via the internet, and to provide an indication of published sources that interested readers may review. The titles of some books are self-explanatory. Good books on critical thinking commonly contain sections on fallacies, and some may be listed below.

External links

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