How many letters does the top answer for “the quality of not conforming to fact or truth” have?

The most common answer is incorrectness (13 letters).

Crossword clue: the quality of not conforming to fact or truth

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

incorrectness 13 letters wn-def

the quality of not conforming to fact or truth

wrongness 9 letters wn-def

the quality of not conforming to fact or truth