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You practically answered your own question. In these two cases, you should probably use a third party narrator. "very intelligent, like Sherlock Holmes (In the books, Dr. Watson is the point of v...
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Source: https://writers.stackexchange.com/a/16327 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
You practically answered your own question. In these two cases, you should probably use a third party narrator. "very intelligent, like Sherlock Holmes (In the books, Dr. Watson is the point of view) very limited, some say stupid or mentally handicapped, like Hodor from A Song of Ice and Fire" The first person shouldn't narrate, and the second person can't. Most other people can narrate for themselves, even "above average" people, as long as they aren't "outliers." In the above, Holmes is an "outlier" who makes Dr. Watson look "average" by comparison (he's actually well above average). Other than the above, you don't need to "limit" your characters, just so they can be (self) narrators.