Why AI Makes Things Up
A confident storyteller who, when they don't remember the details, fills in the gaps with something that sounds right. They're not lying. They genuinely don't know the difference between what they remember and what they invented.
Use the arrows below or the dots above to move through the stages.
Stage 1 -- Same Mechanism, Different Outcome
Two Prompts, One Process
When It Works
What is photosynthesis?
When It Doesn't
Tell me about Dr. Sarah Chen's research at MIT
Same process. Same mechanism. Different outcome.
Both generated the same way. Photosynthesis matches reality. The researcher is fiction.
Stage 2 -- Fluency vs. Accuracy
Can You Spot the Fiction?
AI-generated response about the history of the Rosetta Stone
Click each sentence to reveal whether it is accurate or fabricated
Fluency and accuracy are independent. Beautifully written and completely false can coexist.
Stage 3 -- Randomness and Reliability
Creativity Does Not Guarantee Accuracy
More Variation
More Predictable
Changing randomness can change the style and variety of an answer, but it does not guarantee factual accuracy.
Stage 4 -- Risk Factors
Where Hallucination Hides
Reduce risk with retrieval, citations, uncertainty signals, trusted tools, and verification against reliable sources.