->''"I reckon there's been a lot of chaps in our position, down across the years. Makes you wonder, doesn't it? Makes you wonder how much of the world is true."''
-->-- '''Fred Abberline''', ''Comicbook/FromHell''

Writers never let the facts get in the way of a good story. If reality doesn't fit the plot, it can be [[{{Retcon}} changed]]. History and myth are the most common targets of this--it's much easier to convince the viewers that a 9th century pope was actually a woman disguised as a man than that the current pope is female.

When this Reality Retcon is a story premise PlausibleDeniability is generally the aim, but the retcon remains a clear, deliberate, and direct contradiction of generally accepted facts.

Common examples are:
* AlternateLandmarkHistory: Landmarks and phenomena have a completely plot-relevant yet completely false (we hope) true explanation.
* AncientAstronauts: Gods or legendary figures were really [[SufficientlyAdvancedAlien aliens]].
* AncientConspiracy: All history is just a charade, staged by a secret society.
* BeenThereShapedHistory: An original and/or unlikely character is TheManBehindTheMan causing well-known historical events.
** JuliusBeethovenDaVinci: Many historical characters were all the same long-lived person.
* BeethovenWasAnAlienSpy: An historical character had a secret life.
* ETGaveUsWiFi: The development of human technology got a boost somewhere from little green men.
* HistoricalInJoke: History is rewritten for the sake of a single joke.
* PhlebotinumKilledTheDinosaurs: It wasn't a meteor that wiped dinosaurs out, but some powerful force relevant to the story.
* RetroactiveLegacy: Pretending that a given debut work is actually the latest in a longer series going back years.
* WeirdHistoricalWar: A historical war with added fantastical, out-of-the-world elements.