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Sometimes characters are just not that bright. This is an index of tropes related to stupidity, absentmindedness, and forgetfulness.

See ContrivedStupidityTropes for a specific set of these tropes dealing with unrealistic stupidity driving the plot. Compare AntiIntellectualism and contrast IntelligenceTropes.

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!!Tropes:
[[index]]
* AchievementsInIgnorance
* AdultsAreUseless
* AlcoholInducedIdiocy
* AlmightyIdiot
* ApatheticCitizens
* ArtificialStupidity
* ArtisticLicenseGunSafety
* AntiAdvice
* BeliefMakesYouStupid
* BlatantLies
** WildCardExcuse
* {{Blind Shoulder Toss}}
* BullyingADragon
* ButThouMust
** StupidityIsTheOnlyOption
* CallousnessTowardsEmergency
* CannotSpitItOut
* CannotTalkToWomen
* ChildhoodBrainDamage
* ClosedCircle
* ContrivedStupidityTropes
* CorneredRattlesnake
* CountingToPotato
* CreditCardPlot
* CultureBlind
* CuriosityKilledTheCast
* {{Damsel Fight and Flight Response}}
* DamselScrappy
* DeusExitMachina
* DidntThinkThisThrough
* DitchTheBodyguards
* TheDitz
* DogsAreDumb
* DontTouchItYouIdiot
* DramaticSlip
* DugInDeeper
* DumbAndDrummer
* DumbassTeenageSon
* DumbBlonde
* DumbJock
* DumbMuscle
* EatingPetFood
* EitherWorldDominationOrSomethingAboutBananas
* EnragedByIdiocy (a character who has no patience for stupid people)
* EskimosArentReal
* ExplainingYourPowerToTheEnemy
* ExplosiveStupidity
* FeigningIntelligence
** IveHeardOfThatWhatIsIt
* FatIdiot
* TheFool
** FearlessFool
* ForgotAboutHisPowers
* ForgotICouldntSwim
* ForgottenPhlebotinum
* ForgotToFeedTheMonster
* GenreBlindness
** ContractualGenreBlindness
** RealityShowGenreBlindness
* GlobalIgnorance
* GoodIsDumb
* GullibleLemmings
* GunsInChurch
* HistoricalCharacterConfusion (when used to show the character doing it is an idiot)
* HoldingBackThePhlebotinum
* HoldingBothSidesOfTheConversation
* HonorBeforeReason
* HotOnHisOwnTrail
* HumansAreMorons
* IdiotBall
** ConflictBall
** DistressBall
** HeroBall
*** OutOfSightOutOfMind
*** VillainExitStageLeft
** ThirdActStupidity
** VillainBall
*** BondVillainStupidity
*** CutLexLuthorACheck
*** GeneralFailure
*** JustBetweenYouAndMe
*** RevealingCoverup
* IdiotHero
* IdiotHoudini
* IdioticPartnerConfession
* IdiotPlot
* IJustShotMarvinInTheFace
* IllNeverTellYouWhatImTellingYou
* ImprobablyLowIQ
* ImThinkingItOver
* InsaneTrollLogic (an incredibly idiotic and nonsensical logical fallacy)
* ItSeemedLikeAGoodIdeaAtTheTime
* JugglingLoadedGuns
* JustEatGilligan
* KindheartedSimpleton
* KnowNothingKnowItAll
* LawfulStupidChaoticStupid
** ChaoticStupid
** LawfulStupid
** StupidEvil
** StupidGood
** StupidNeutral
* LeftYourLifesaverBehind
* LethallyStupid
* LoveMakesYouDumb
* MercyLead
* TheMillstone
* MooseAreIdiots
* NeverRecycleYourSchemes
* NobodyEverComplainedBefore
* NoMeansYes
* NoPeripheralVision
* NotAZombie
* ObfuscatingStupidity (pretending to be stupid)
* ObliviousToHints
* ObliviousToHisOwnDescription
* PaperThinDisguise
* PhlebotinumInducedStupidity
* PingPongNaivete
* PlayerExclusiveMechanic
* PlotSensitiveSnoopingSkills
* PoorCommunicationKills
* RecognitionFailure
* ReedRichardsIsUseless
* RememberedICouldFly
* RevengeBeforeReason
* ReverseTelescopicVision
* RunsOnIgnorance
* SanityHasAdvantages
* SeeminglyProfoundFool
* SelectiveObliviousness
* SelectiveStupidity
* SidetrackedByTheAnalogy
* StatingTheSimpleSolution
* StopDrowningAndStandUp
* StrangerSafety
* StupidCrooks
* StupidSacrifice
* StupidScientist
* StupidSurrender
* StupidityInducingAttack
* SuicidalOverconfidence
* StrategySchmategy
* SurroundedByIdiots
* TheyJustDontGetIt
* TooDumbToFool
* TooDumbToLive
* TookALevelInDumbass
* TreacherousSpiritChase
* ViewersAreMorons
* ViolationOfCommonSense
* WhatAnIdiot
** ChainedToABed
** HaveYouToldAnyoneElse
** MistakenForIndex
** OnceIsNotEnough
* WorkingClassPeopleAreMorons
* YourBrainWontBeMuchOfAMeal
[[/index]]
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