->''A = A''
-->-- ''The law of identity, the first of the three classical laws of thought''

[[ExactlyWhatItSaysOnTheTin An index of tropes having to do with logic.]] As you can see, many of these {{trope}}s detail ways in which writers can [[YouFailLogicForever fail at logic]]. For some reason, there aren't nearly as many about correct logic...

Compare IntelligenceTropes. Contrast MadnessTropes and EmotionTropes, which frequently defy logic in various ways.
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[[index]]
* LogicalFallacies
** AdHoc
** AdHominem (Attacking the person, not the argument.)
** AnecdotalFallacy
** AppealToAuthority
** AppealToConsequences
** AppealToFear
** AppealToFlattery
** AppealToForce
** AppealToIgnorance
** AppealToInherentNature
** AppealToNature
** AppealToNovelty
** AppealToObscurity
** AppealToPity
** AppealToPopularity
** AppealToRidicule
** AppealToTradition
** AppealToWealth
** AppealToWorseProblems
** ArgumentumAdNauseam (talking on without properly addressing the debate)
** ArgumentumAdLapidem (dismissing a statement as absurd without providing any proof)
** AssociationFallacy
*** HitlerAteSugar
** BandwagonFallacy
** BeggingTheQuestion
** CabDriversFallacy
** ChewbaccaDefense (sophistry)
** CircularReasoning
** ConfirmationBias
** ConverseError
** ExtendedAnalogy
** FallacyFallacy (use of a fallacious argument does not make a position false)
** FallacyOfComposition (generalizing from the parts to the whole)
** FallacyOfDivision (generalizing from a whole to the parts)
** FalseCause (correlation does not imply causation)
** FalseDichotomy
** FourTermsFallacy (re-using a word, but using a different meaning)
** FrozenAbstraction
** GamblersFallacy (Probability related failure of logical.)
** GoldenMeanFallacy (argument to moderation)
** HardWorkFallacy (outcome is directly proportional to the effort)
** {{Hypostatization}} (treating an abstract idea as a physical object)
** IrrelevantThesis
** LoadedWords
** ManyQuestionsFallacy (asking a "loaded" question)
** MovingTheGoalposts
** NonSequiturFallacy (includes Affirmation of the Consequent, Denial of the Antecedent, Undistributed Middle and several others)
** NoTrueScotsman (Defining away inconvenient items; originally "No Scotsman puts sugar in his porridge!" "Angus [=MacGee=] does." "Ah, but then he's not a True Scotsman!")
** PerfectSolutionFallacy (a subcategory of False Dichotomy)
** ProofByExamples (generalizing from too-few examples)
** ProsecutorsFallacy (a form of misusing statistics)
** RetrospectiveDeterminism
** ReverseSlipperySlopeFallacy
** SemanticSlipperySlopeFallacy
** SharpshooterFallacy (shooting a gun at a wall, then painting a target around the bullet-hole)
** ShiftingTheBurdenOfProof
** SlipperySlopeFallacy
** SpecialPleading
** SpotlightFallacy (making a generalization based on the amount of news coverage)
** StolenConcept
** StrawmanFallacy
** SunkCostFallacy
** TwoNegativePremises
** UndistributedMiddle
* ArkhamsRazor (In fiction, the oddest solution is probably correct)
* BatDeduction
* Catch22Dilemma
* EntertaininglyWrong (When somebody is wrong, for the right reasons)
* FactOpinionArgument
* FridgeLogic (Logic problems that are only noticeable when you think a bit about them)
** {{Headscratchers}}
** PlotHole
* GivingUpOnLogic
* IfJesusThenAliens
* InsaneTrollLogic (When YouFailLogicForever is either intentional, or crosses over into PoesLaw.)
* JustifiedTrope (When use of a trope is made logical)
* LogicBomb
* MoonLogicPuzzle (A puzzle whose solution relies on overly narrow or unconventional interpretations of the available evidence)
* OccamsRazor (Explanations should avoid unnecessary complications.)
* PuffOfLogic
* RandomPasserbyAdvice
* ReasoningWithGod
* RightForTheWrongReasons (When you reach the correct conclusion, but by faulty logic.)
* SoundValidTrue (The three are not the same.)
* TheSpock
* TwoPlusTortureMakesFive
[[/index]]
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