AI and machine learning

Hallucination

  • AI and machine learning

Definition

When an AI model produces information that sounds confident but is incorrect or made up.

Example

An AI assistant produces a convincing report citation that cannot be found in the source material.

See how it works

Looks credibleA polished answer with a citation
Must be checkedSource actually supports the claim

Verify consequential facts and references against reliable sources.

Check your understanding

Common mistake: Confident wording is not evidence that a generated claim is correct.

What should you do before citing an AI-generated reference?

Show explanation

Open the original source and verify the author, document and claim.

For your role

Choose your role to see what this term means in your work.

Why it matters

AI answers need checking before you rely on them.

Where it is used

AI tool reviews and AI risk discussions.