Glossary / Hallucination

Hallucination: what it means

When an AI states something that sounds right but is made up, such as opening hours nobody gave it.

Also written: hallucinations, made-up facts, invented.

How it shows up when you build

Check the AI's work: Models state invented details confidently: hours, prices, awards. Treat every specific as unverified.

A tip

Tell the model: 'If a fact is missing, write [YOUR HOURS HERE] instead of guessing.'

Practise it

Build it with an AI tool and check the result in these exercises:

8. Check the AI's work (Spot errors and made-up facts)
5. Write the words (Headline, offer, call to action)
7. Ready for strangers (Launch basics)

Related terms

Audit, Checks, Deployment, Fact sourcing, Meta description, Placeholder, Placeholder discipline, Prompt