Language models write convincingly, even when they are wrong. Anyone using AI needs a review process.
Why models make things up
A language model predicts the next word that fits statistically. It does not access a secured database of facts. That is why an answer sounds fluent even when the source, figure or connection is invented.
Typical patterns
- Invented sources, studies or quotations.
- Wrong figures, dates and names.
- Outdated information without any note on the state of knowledge.
- Confident wording without any uncertainty.
Four checks worth doing
- Ask for the source, and open the source yourself.
- Always verify figures, legal and medical content.
- Have answers broken down into checkable parts.
- Work with your own documents: provide current texts as reference.
Technology alone is not enough
Risk management frameworks such as the NIST AI Risk Management Framework rely on four steps: understand context, name risks, measure impact, apply controls. Human oversight remains decisive, especially for decisions with consequences.
A wrong answer is written quickly. A checked answer builds trust.
Conclusion
Hallucinations are not an outlier but a property of the system. Those who know this verify, and use AI where verification is possible.
Sources & further reading
- Ji et al.: Survey of Hallucination in Natural Language Generation (arXiv)
- NIST: AI Risk Management Framework
- OpenAI: prompt engineering guide
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