falseness

(noun) the state of being false or untrue. Synonyms: falsity. Examples: "Argument could not determine its truth or falsity."

(noun) unfaithfulness by virtue of being unreliable or treacherous. Synonyms: faithlessness, fickleness, inconstancy.

(noun) the quality of not being open or truthful; deceitful or hypocritical. Synonyms: insincerity, hollowness.