Factlet
Encyclopedia
Language expert William Safire
William Safire
William Lewis Safire was an American author, columnist, journalist and presidential speechwriter....

 in his On Language column advocated the use of the word factlet to express a "little bit of arcana".

Factlet would be an alternative word for factoid. A factoid is a questionable or spurious—unverified, incorrect, or fabricated—statement presented as a fact, but with no veracity. The word factoid
Factoid
A factoid is a questionable or spurious—unverified, incorrect, or fabricated—statement presented as a fact, but with no veracity. The word can also be used to describe a particularly insignificant or novel fact, in the absence of much relevant context...

is also sometimes used to mean a small piece of true but valueless or insignificant information, which is in contrast to the original definition. As a result of confusion over the meaning of factoid, some English-language style and usage guides recommend against its use.
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