-oid is a suffix indicating falseness, e.g. an android is a false man, and asteroid is a false star — and a factoid is a false fact. 'Factlet' would be the rig

-oid is a suffix indicating falseness, e.g. an android is a false man, and asteroid is a false star — and a factoid is a false fact. 'Factlet' would be the right word for a tiny fact.