Lesson 1153 of 1455
Why AI Hallucinates: The Three Types You'll Actually See
Not all hallucinations are alike — citation lies, fact lies, and confident-tone lies each need a different defense.
Builders · AI Foundations · ~4 min read
The big idea
AI doesn't 'lie' randomly — it lies in patterns you can predict. Knowing the three types saves you from getting fooled.
Some examples
- Citation hallucination: ChatGPT invents a JSTOR article that fits perfectly
- Fact hallucination: dates, names, statistics confidently wrong
- Confidence hallucination: AI sounds certain about something it guessed
- Recent-event hallucination: AI fills knowledge gaps with plausible fiction
Try it!
Ask ChatGPT for 3 statistics on any topic. Verify each one against a real source. Notice which type of hallucination it gives you.
Key terms in this lesson
Practice this safely
Try this with a school, hobby, or family example where the stakes are low. Use the AI output as a draft you can question, not as the final answer.
- 1Ask AI to explain hallucination in plain language, then underline anything that sounds uncertain or too broad.
- 2Give it one detail from "Why AI Hallucinates: The Three Types You'll Actually See" and ask for two possible next steps plus one reason each step might be wrong.
- 3Check citation against a trusted source, teacher, adult, expert, or original document before you use it.
End-of-lesson quiz
Check what stuck
8 questions · Score saves to your progress.
Lesson help
Questions are best handled with a grown-up here.
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