AI doesn't know things, it predicts what words should come next, based on patterns in text it was trained on. It sounds confident regardless of whether the answer is right or completely made up. That's not a bug you can see, it's how the system works.
If the answer depends on something recent, news, stats, events, people's roles, verify it independently. AI's knowledge stops at a cutoff date.
If it requires your personal context, real-time info, or genuine judgment, AI is guessing. You know your situation better than it does.
AI always sounds sure. That doesn't mean it's right. For anything important, check a real source, especially for specific facts, names, and numbers.