I've never had it say 'I don't know', but it apologizes and admits it was wrong plenty.
Sometimes it comes up with a better, acceptably correct answer after that, sometimes it invents some new nonsense and apologizes again if you point out the contradictions, and often it just repeats the same nonsense in different words.
Sometimes it comes up with a better, acceptably correct answer after that, sometimes it invents some new nonsense and apologizes again if you point out the contradictions, and often it just repeats the same nonsense in different words.