so basically, fuzzing.
https://en.m.wikipedia.org/wiki/Monkey_testing
Edit: looks like some consider these the same nowadays.
Guess what, we now have a chatbot AI that not only doesn't mind working with nonsense input, it will happily produce logically-inconsistent statements on its own, and can do it so sneakily and convincingly, that it's the human operator who could end up believing logically inconsistent statements, without even realizing it, and possibly end up in serious trouble some time later.