[ChrisRR]

Your second little fact is that "factoid" means a lie that has been spread so widely that it's treated as a fact, and doesn't mean a little fact

[Ariarule]

Meta-humor, maybe? "A factoid is either an invented or assumed statement presented as a fact, or a true but brief or trivial item of news or information" -- https://en.wikipedia.org/wiki/Factoid