Person 1: The first person to talk to you today is a liar.
Person 2: That would be you...
Person 1: Exactly.
Person 1: So is that
true or false?
Person 2: That's an
untruth, because you're projecting properties that can't exist; it's neither true nor false and you're an idiot.
Person 1:
Untruth isn't a word.
Person 2:
Spellcheck disagrees.