Why AI makes things up, and how to check what it tells you
AI assistants write fluent, confident text, including when they are wrong. This is often called hallucination. You do not need to avoid assistants because of it, but you do need a few habits.
Updated . General information for everyday use, not professional advice.
What is going on
An assistant generates the most plausible-sounding answer, which is not the same as looking up a fact. OpenAI has published research describing one reason this persists: the way models are trained and tested can reward confident guessing over saying "I do not know". The same research says hallucinations can be reduced but that accuracy will not reach 100 percent.
Where mistakes show up most
- Specific numbers, dates and statistics
- Quotes, and who said what
- Citations, links and book or article titles that may not exist
- Recent events, and anything niche or local
- Details about named people or small businesses
Five checking habits
- Ask for sources, then open them. If a link does not work or does not say what was claimed, treat the claim as unproven.
- Ask: "What are you unsure about in that answer?" It will often point to its own weak spots.
- Check anything important against a second, independent source.
- Ask the same question a different way and see whether the answers agree.
- For health, money or legal decisions, use the assistant to prepare questions, then confirm with a qualified professional.
List the factual claims in your last answer as bullets. For each one, say how confident you are and what I should verify, and where.
It is still useful
Drafting, brainstorming, rewording and explaining ideas rarely need a fact check in the same way. Match the effort to the stakes: relaxed for a birthday message, careful for a medical or financial decision.