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The Rain Man been disambiguated. We do have:

* DisabilitySuperpower: A disabled character with some ability that "compensates" for their handicap.
* HollywoodAutism: For the common depiction of [[https://en.wikipedia.org/wiki/Autism_spectrum autism spectrum disorder]] in fiction.
* IdiotSavant: A character who is mentally challenged, except when it comes to a certain ability.
* ''Film/RainMan'': The 1988 film loosely based around real-life savant Kim Peek (1951-2009), who had [[http://en.wikipedia.org/wiki/FG_syndrome FG syndrome]] (though nobody realized it until after he died).

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