falsity

/ˈfɔːlsɪti/
noun
  1. The quality or state of being false or untrue.
    • Philosophers have long debated the nature of truth and falsity.
    • The scientist proved the falsity of the old theory with new data.
    • The falsity of the rumor was quickly exposed.
  2. A false statement or belief; a lie.
    • The book is full of historical falsities.
    • He repeated the same falsity so often that some people began to believe it.
    • The politician's speech contained several obvious falsities.