Factoid is stating a fact that is not backed up by evidence. The factoid may not be trusted because
Factoids become widely treated as if they were true.[1]
In 1973, the term factoid was created and first used by Norman Mailer.[2]
A factoid is "an item of unreliable information which is repeated so often that it becomes accepted as a fact".[3] The most important thing is that the factoid is widely believed.[4] A factoid refers to something that looks like a fact, could be a fact, but in fact is not a fact.[5]
The term can also be used to describe partial information without context.