[[quoteright:182:[[Webcomic/{{XKCD}} http://static.tvtropes.org/pmwiki/pub/images/doublestandard_630.png]]]]
[[caption-width-right:182: [[DoubleStandard The Battle Continues.]]]]

->''"Call this an unfair generalization if you must, but old people are no good at everything."''
-->--Moe Syzlack, ''WesternAnimation/TheSimpsons'', when Mr. Burns wants to join the bowling team

Bob knows that Alice is stupid: She's a woman, and women are stupid - never mind that Alice has a [=PhD=] and an IQ of 150, she's still a woman... and women are stupid, thus Alice is stupid. If Bob finally accepts that Alice is indeed smart, he might resort to [[NoTrueScotsman claiming that she is not "really" a woman]]. Bonus points if Bob uses Alice [[LogicBomb not being stupid as an example of the principle that women are stupid]] - either because [[NoTrueScotsman she's too smart to be a real woman,]] or as [[InsaneTrollLogic "the exception that verifies the rule".]] Also bonus points if "Alice" isn't even a woman, and Bob [[StrawAffiliation simply assumed a neutral Internet nickname to be female because he thinks the person is stupid]]. Alternatively, Alice actually does something stupid one single time - and Bob draws the conclusion that she is (and all other women are) ''always'' stupid.

Of course, this is all simply Bob doing some really bad categorism: Racism if it's about race, sexism if it's about gender, ageism if it's about age, homophobia if it's about homosexuals, and so on. If Alice listens too much to him, she may come to suffer from InternalizedCategorism.

This trope can come into play in two ways: Either ''establishing'' or ''upholding''. The first is often in the form of making a raging overgeneralization about a group - one that cannot possibly be true in all cases, and is often so outrageous that it might even be hard to find a valid example. The second is upholding the prejudice in the face of overwhelming evidence to the contrary, often with the help of TheoryTunnelVision, InsaneTrollLogic, and/or IRejectYourReality.

Sometimes combined with StrawAffiliation to make it extra insane: If you have Trait X you belong to group Y, and everyone in group Y are Z. For example, if you are a man who has long hair, you obviously turn over gravestones and nail live kittens to church doors. Because men with long hair are satanists, and satanists do that kind of stuff. Compare NonsenseClassification and InsaneTrollLogic. When used by characters rather than the narrative itself, tropes such as DepravedHomosexual, BondageIsBad, and AllGaysArePedophiles are often played as aggressive categorism. With the first two tropes, this come in the form of reducing people to their sexuality and reducing the sexuality to the sex. With the last two tropes, it comes in the form of deciding that everyone who have a certain quality X also has the unrelated quality Y[[note]]For example, in the case of AllGaysArePedophiles, homosexuality is the X quality, while pedophilia is the unrelated-but-bundled-together quality Y[[/note]]. This line of thinking easily leads to an AbominationAccusationAttack. When the aggressive categorism grows into being mentally unhealthy, it often takes the form of [[CategorismAsAPhobia a phobia]] or a tendency to [[BlackAndWhiteInsanity see everything in black and white]].

Often done by RacistGrandma, HeManWomanHater, WindmillCrusader, StrawLoser, or NobleBigot, and often used to highlight how shallow the character's thinking is. This is often PlayedForLaughs at the character's expense or as a joke in its own right. Rarely done by more nuanced and PlayedForDrama characters, such as TroubledSympatheticBigot. May lead to IrrationalHatred. Note that "ThereAreTwoKindsOfPeopleInTheWorld" is usually ''not'' this: Even when it's not a joke or metaphor, it's usually restricted to one parameter.

Compare DoubleStandard.


[[folder:Anime & Manga]]
* ''Anime/CrossAnge'': In a world where mages are commoners, every muggle is treated ''worse'' than a witch; not only are muggles forced to a deserted island where they secretly fight an invasion force of alien dragons in highly unstable cool mecha with a disturbingly high death rate, but the friends and family who actually cared for them slowly erode in opinion until it's as if they hated their muggle companion all along. Including ''Ange's beloved little sister''; [[Franchiuse/CodeGeass Princess Nunnally]] [[AvertedTrope that]] {{bitch|InSheepsClothing}} [[MisBlamed is]] [[NeverMyFault NOT]]. (In her possible defense it might have been [[CorruptTheCutie her older brother Julio]] convincing her Ange was to blame for the death of their parents.) Muggles are treated like devil spawn even if their behavior doesn't change or they show exceptional merit and mercy. [[spoiler:Though this is only partly their fault: it's revealed near the end that the mana they use is like meth, only it makes them obedient to an abusive thousand-year-old pervert]]. In response to this, said muggles have no qualms with opening fire on civilians for their past torments (said civilians usually shown having guns, and planning to use them first), but show mercy to traitors in their ranks for harsher war crimes.
** One major exception: Momoka is a mage who never loses her loyalty to Ange, even though she thinks that most muggles are scary dangerous. This is explained by her abnormally high willpower, [[spoiler:which allows her to use magic on the pervert ''who invented mana and controls it like a computer'']].

[[folder:Comic Books]]
* In ''ComicBook/ChickTracts'', protagonists are likely to do this to Christians or non-Christians depending on whether they are Saved or not. [[StrawLoser Those who do it to Christians]] are always proven wrong (and either get Saved or go to hell), while the Christians who do the same thing [[TheUntwist always turn out to be right]].
* In ''ComicBook/BitchyBitch'', Midge's insufferable [[TheFundamentalist fundamentalist]] coworker does this all the time. For example, she "knows" that the recently hired temp is a witch who can put curses on people, because she has a necklace with a pentagram.
* ''ComicBook/BitchyButch'' does this all the time, living in her own unhealthy little world where all men (and all heterosexual women) are total {{Jerkass}}es. The only time she managed to see a guy for the nice person he really is, she refused to see that he's male.
* In the 4th album of ''ComicBook/WhateverLoveMeans'', The rant about Jihad Jane plays this trope on two levels. First, Liv accuses mainstream society of doing this to Arabs and Muslims, assuming that they are all terrorists. Second, she focuses on the fact that Jihad Jane was blond, female, middle aged and dressed in a certain style common among western women. Having established that, she moves on to portray a scenario where all western women with this style are treated as if they were terrorists.
* In one ''Samir'' strip, one white woman try to get the protagonist (a brown man) arrested for trying to rape her. He didn't come closer than 20 yards, much less touch her. But he ''did'' walk on the same street as her. This comes as the comedic punchline after a long angry InternalMonologue of his, complaining about prejudice against men and against non-whites. The woman is portrayed as being totally honest in her analysis of the situation.
* ''MadMagazine'' used to run a recurring feature called ''You can't win with a bigot'' which alternated examples of bigots contradicting themselves in ways that ensured their interpretation of events always conformed to their prejudices.

[[folder:Fan Works]]
* In ''FanFic/SonOfTheDesert'', Havoc, Breda and Fuery believe that all Ishvalans are fanatically religious. Edward tries to call them out on generalizing an entire group before snapping and outting himself as Ishvalan.
* From ''FanFic/SaviorOfDemons'':
-->Goku: "It's simple, Frieza. I don't like to see anyone, regardless of who they are, getting hurt. Not even someone like you. If you can't fight back, well, fighting's no fun." He shrugged.
-->Frieza: "Th-that's impossible!" Frieza spluttered, "You're a Saiyan, and as such you are [[BloodKnight bloodthirsty by nature!]]"

* In ''Film/TuckerAndDaleVsEvil'', Chad gets all of his friends to believe that the local hillbillies are trying to murder them. He hates hillbillies because a hillbilly murdered his parents. [[spoiler: Eventually he discovers that his father was the hillbilly after all. Not all of them are evil psychos, but this one was and it seems to have been passed on to Chad]].
* In ''Film/ShowMeLove'', Markus is the obvious case, with his inane rant about how women can't possibly understand cellphones and men can't possibly understand makeup. However, it's implied that the people in general are just as narrow-minded, they just don't flaunt it like he does. Life in a small town is hell.

[[folder:Live Action TV]]
* ''Series/{{Smallville}}'': Jonathan Kent is firmly convinced that ''all'' Kryptonians are evil by nature. When Martha points out that [[InterspeciesAdoption their son]] is a Kryptonian himself, Jonathan simply replies that Clark is the exception because he was {{raised by humans}}.

* Parodied in Nanne Gronvall's song [[http://www.youtube.com/watch?v=YfR58YVqTH4 Fördomar]]. The protagonist spends the song doing aggressive categorism against all kinds of people while [[IgnorantOfTheirOwnIgnorance considering herself to be enlightened and free from prejudice]].
* Defied in Music/{{Prozzak}}'s ''[[http://www.youtube.com/watch?v=yacVgQ89b2E Be As]]'', which is about not letting people lock you into narrow categories such as white/black or straight/gay.

[[folder:Recorded and Stand Up Comedy]]
* Creator/GeorgeCarlin was quite fond of doing this in his {{rant|Comedy}}s satirizing the InsaneTrollLogic that underlies this type of thinking.

* In ''Arne Anka'', the protagonist makes a [[{{Jerkass}} jerky]] attempt to flirt with a woman, who responds by exclaiming to her friend that all men are the same kind of pigs. This causes Arne to go on a rant about starting concentration camps for men, and giving the woman the "Sieg Heil" salute.

[[folder:Video Games]]
* In ''VideoGame/{{Crysis}}: Legion'', [[SemperFi Colonel Barclay]] refers to ''Literature/TheWarOfTheWorlds'' when discussing the Ceph. Gould is {{Mind Screw}}ed by this - he's a ProperlyParanoid ConspiracyTheorist who has feared TheGovernment and [[ArmiesAreEvil especially the military]] his entire life, and "lifers who read ancient science fiction donít fit comfortably into his worldview."
* The Angels in the ''Disgaea'' series hinge in and out of this. Angels generally believe that Demons are pure evil [[FantasticRacism solely because they're demons]]. As Angels see themselves as harbingers of complete good, they lump every Demon into the category of "evil" just because. Recent games imply that they're slowly starting to change.
** In Disgaea 5, it's mentioned that Demons seem to suffer from a little bit of this toward Angels; explaining why [[spoiler:Christo hid his identity the way he did]]. To be fair, they have [[FreudianExcuse been the ire of every known Angel for who-knows-how-long]]. (Heck, it's even a voice option for the Male Angel class!) If the possibility of this being a prequel is true, however....
* If a female Warden recruits Sten in ''VideoGame/DragonAgeOrigins'', a conversation will eventually ensue where he states that he doesn't believe you're a woman, because qunari women cannot be warriors. Despite the deep cultural divide, you can eventually make him respect the Warden as a warrior.

* As with most other tropes, ''Webcomic/{{xkcd}}'' did it: [[http://xkcd.com/385/ How It Works]].

[[folder:Web Original]]
* One of the annoying customers in ''Website/NotAlwaysRight'' doesn't like the music. [[http://notalwaysright.com/this-strange-kind-of-woman-needs-to-hush/20308 She puts the blame]] for this on teenagers and their modern tasteless music... in spite of the music ''and'' the people playing it being older than her!

[[folder:Western Animation]]
* Played straight with Lampshade in ''WesternAnimation/TheSimpsons''. See page quote.
** Shows up in regards to "Those lousy teens" as well. When Homer and his drinking buddies get wasted and cause a ''lot'' of damage with his car (with a blatantly visible trail leading to his car parked on the front lawn), the police conclude that it was the work of "punk kids", and enstate a curfew.
* [[TokenEvilTeammate Cartman]] from ''WesternAnimation/SouthPark'' does this with just about any kind of minority, often in utterly bizarre ways ("[[RedHeadedStepChild gingers]] [[MemeticMutation have no souls]]," for example). However, sometimes he's portrayed as [[RuleOfFunny actually being right]] about some things, to the perpetrators' [[StopBeingStereotypical own annoyance]] (e.g. Token's ability to play bass, and Kyle carrying "Jew-Gold" around his neck).