Um, a fact that is untrue is not a fact, it is a fiction. Not too hot on what the word fact actually means, are you?<quoted text> A fact can be truth or false, but a truth can be a fact and that fact is an established truth.
something that actually exists; reality; truth: Your fears have no basis in fact.
something known to exist or to have happened: Space travel is now a fact.
a truth known by actual experience or observation; something known to be true: Scientists gather facts about plant growth.
something said to be true or supposed to have happened: The facts given by the witness are highly questionable.
Law.. Often, facts. an actual or alleged event or circumstance, as distinguished from its legal effect or consequence. Compare question of fact, question of law.
Copied and pasted from: http://dictionary.reference.com/browse/fact just to hepl you out.