A term coined by Justin B. Rye in his essay "[[http://www.xibalba.demon.co.uk/jbr/trek/3.html Star Trek: Mark Two]]", which points out various inconsistencies in ''Franchise/StarTrek'' and ways of avoiding them for a hypothetical remake.

Oneshot Revisionism occurs when a writer notices an illogical trope or plot device and attempts to avert it. More often than not, the attempt only draws further attention to the illogic of the convention - "if X didn't happen here because of Y and Z, why does it happen every other time?" - and at the same time makes it harder for other writers to HandWave the whole thing away. Especially bad when the plot device in question has been used multiple times in the same {{Canon}} where the one-shot revision is set.

The important thing about Oneshot Revisionism is that it ''works''; generally the only problem with it is that it draws attention to all the other times it theoretically could and should have been used but wasn't. This distinguishes it from a VoodooShark, which doesn't even work on its own terms.

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!!Examples:
* From ''Franchise/StarTrek'', taken from the aforementioned essay:
** The "Kirk Maneuver" in the second movie: a ship "diving" and then "resurfacing" before the attack. It's a clumsy break from the {{Two-D Space}} convention, still unconvincing (why resurface?), and making it impossible to just discount {{Two-D Space}} as a TV convention that doesn't reflect [[LiteraryAgentHypothesis how the space battles "really" went]].
** In the sixth movie, there is the one time when a ship loses artificial gravity. Which only highlights the fact that it breaks much more rarely than it should.
*** In fact, in the Voyager episodes Year of Hell, the ship is scarred and barely holding together, but never does the gravity give out.
**** ExpandedUniverse material justifies it ([[VoodooShark sort of]]) with the explanation that artificial gravity is built to be almost impossible to disrupt in Federation starships because most Federation member races are really uncomfortable in zero-G and work far less efficiently. This makes sense considering most of them only go out in zero-G conditions for bare minimum qualification trials. So while other factions' vessel designs use a centralized gravity generator, Federation gravity is plated into the floors so that any disruptions are local. Life-support and DeflectorShields are apparently harder to decentralize.
** Image lag effects in the ''Series/StarTrekTheNextGeneration'' episode "The Battle". Why do they happen only this time and not every time there's a disruption in faster-than-light travel?
** The "Franchise/StarTrek Phase II" fan-film web episode "[[http://io9.com/5113745/long+suppressed-gay-star-trek-episode-comes-out Blood and Fire]]", based on a rejected Next Generation script, is a one-shot revision of the complete lack of homosexuals in the Franchise/StarTrek universe. So now instead of zero homosexuals in the universe, there are exactly two, which is almost worse.
** The ExpandedUniverse novels have started being pointedly casual about mentioning this or that character with a same-sex partner, possibly to compensate for the above. It can sometimes come over as trying too hard.
** In the TNG episode "The Wounded" we see a space battle at 250,000 km, which is decided by one ship using their superior weapon-range to engage the enemy at a distance where they can't return fire. This make all those occasions where ships fight nose-to-nose all the more dumb.
* In ''StarWars'', SpaceIsNoisy is just a convention that fans accept, along with the use of the convention of sound traveling at the speed of light, as being imaginary sound effects for the viewers' pleasure. The ExpandedUniverse goes further and {{Hand Wave}}s that these sound effects are [[http://starwars.wikia.com/wiki/Aural_sensor for the pilots' use as well]]. ''Attack of the Clones'' tried to portray space more realistically, only to stop halfway: there is sound in space, but it travels slower than light!
* Each ''KnightsOfTheOldRepublic'' game contains exactly one situation where an NPC will scold you for being a KleptomaniacHero. Others will completely ignore you looting their possessions under their nose, which gives you no dark side points either.
** Except the Tusken Raiders, who will not merely scold you but shoot you on sight...
* ''Series/StargateSG1'' has such a moment associated with the pilot episode, "Children of the Gods":
** The {{novelization}} of the episode has the characters [[LampshadeHanging lampshade]] AliensSpeakingEnglish, which confirms that yes, the aliens do speak English after all; it's not merely translated for the audience's benefit after Daniel reconstructs the local language and teaches it to his teammates off-screen.
* In ''VideoGame/DragonQuestII'', when the KleptomaniacHero opens a locked door in Midenhall, the guard initially reacts the way you'd ''expect'' somebody to when someone breaks in to loot a chest. However, he then recognizes the Prince and apologizes.
** Similarly, in ''VideoGame/DragonQuestIII'', your hero is the son/daughter of Ortega. When you break into the treasure chamber of your liege's castle, the guard recognizes you and says that he respects your father too much to stop you. He still mildly [[WhatTheHellHero calls you out for it]], particularly since the king will actually give you permission to raid the treasury late in the game...
* The ''Series/DoctorWho'' story "Midnight" took on the oft-used idea that the Doctor could show up with no history, no credentials, and a lot of knowledge which he refuses to explain, be detained for two minutes, and then be treated like an authority because there's a crisis going on. In this one story, these traits actually make everyone else ''suspicious'' of the Doctor as would happen in reality.
** Which is only highlighted by the fact that Donna's absent from the episode. With a human to vouch for him, the Doctor's okay, but when this man shows out of nowhere with no ties to anyone and he seems to know ''everything''...
** There have been a couple of attempts to nerf the Sonic Screwdriver, by explaining that it doesn't work on anything with a "deadlock seal" (which showed up fairly often for a while, but seems to have been abandoned), or anything made of wood. Which means that he can use it to hack an alien computer millions of years in the future, but can't open a modern bedroom door. One radio adventure featuring the Fourth Doctor (possibly adapted from one of the lost episodes) also featured a slightly more sensible version; the Sonic Screwdriver can shift the tumblers inside a lock, [[RockBeatsLaser but can't exert enough force to move a really stiff and heavy door-bolt.]]
* The [[{{Retcon}} revised]] [[Creator/JMichaelStraczynski JMS]] origin for ComicBook/{{Spider-Man}} which says that a [[AWizardDidIt "spider-totem"]] made him [[BecauseDestinySaysSo fated]] to get the power, and explains why Spider-Man has a lot of villains who are themed around animals. Of course, this just calls attention to the fact that lots of ''other'' superheroes also have a gallery of themed villains with no explanation whatsoever.
** [[http://www.marvunapp.com/Appendix/origin.htm Another such explanation]] was given by writer Mark Gruenwald in ''ComicBook/{{Quasar}}''; That all superheroes and villains in the Franchise/MarvelUniverse are the result of a cosmic being's influence, and that "themed" beings are naturally drawn to each other. This also counts as OneShotRevisionism, as the idea's never been acknowledged by other writers; of course, since this was in Quasar, it's likely no one knows about it.
* An untold story of the ''ComicBook/CrisisOnInfiniteEarths'' comic book series was published in 1999, featuring Earth-D, a perfectly racially mixed world. On it, all the aliens pointedly did not have human racial features. What makes this OneShotRevisionism is that it makes it harder to forget that the aliens still had most human features ''not'' associated with race.
* In ''Franchise/OnePiece'', everyone is MadeOfIron, except for Kuina, who [[DeathByFallingOver dies when she trips and falls]]. A character comments on her death by remarking that "people are so fragile."
* ''Series/PowerRangersRPM'' did a lot to decrease some of the worn out clichés of the series and even came up with some decent {{hand wave}}s for others. Such as the rangers' morphing call being a voice reading security device. However it does still cause some head scratching when the rangers need to shout '''POWER RANGERS RPM!''' when using the Megazord finisher (and even then, not every time).
* Some campaign missions in ''VideoGame/{{Starcraft|I}}'' take place on space stations or in other places where [[YouRequireMoreVespeneGas natural resources]] you need to build a base and train troops would not be realistically found. Because this is a strategy game, they are provided anyway with no explanation. However, in one mission in the [[VideoGame/StarcraftII second game]], your MissionControl mentions how you were lucky to find resources because this particular space station is very old and has undergone bombardings by resource-rich asteroids. So... what about all the other space stations?
* In ''Literature/HarryPotterAndTheHalfBloodPrince'', Harry's friends take a rare luck potion before the Death Eaters show up at Hogwarts. This [[JustifiedTrope justifies]] the Death Eaters' [[ImperialStormtrooperMarksmanshipAcademy Imperial Stormtrooper Marksmanship]] and it's suggested afterwards that many of Harry's friends would have died had they not taken the potion. However, the Death Eaters having bad aim was played straight in the climax of [[Literature/HarryPotterAndTheOrderOfThePhoenix the previous book]].
** In the case of the Battle of the Ministry, the members of Dumbledore's Army who were there were using the twisting corridors as well as their smaller size and youth to their advantage; outpacing the Death Eaters as well as using extensive cover and tactics to avoid taking casualties. Even then, however, they still lose several members (Hermione, Ginny, ect.) to the Death Eaters as they attempt to escape.
* ''Seven Sorcerers'' by Caro King averts NobodyPoops... exactly once in the beginning when Nin, fresh from the normal world, asks for a pause to relieve herself. Afterwards, one could think humans in Drift don't have to use toilets. (Magical being get a pass as they are literally based on imagination).
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