What we don't know now is for large language models to say they don't know something. So you ask it a question, and if that the answer to that question is not in the system, it still comes up with an answer. So it'll look at everything and give its best answer. And if the best answer is not there, it still gives you an answer. But that's considered a hallucination, and we know a hallucination. Yeah, that's what it's called. Really?