I'm a little confused by your reply. Jailbreaking won't prevent it from hallucinating, preventing hallucination is an unsolved hard problem.
I haven't had ChatGPT refuse to answer anything unless I was intentionally trying to provoke it into creating something obviously unsafe/unethical, with maybe two or three exceptions. I've tried a variety of questions across many domains, so now I'm intensely curious to know what usecase it falls apart on so frequently!