AI for students · lesson 6 of 24 · free

When AI is wrong: hallucinations — AI for students

AI chatbots predict likely words — they do not look facts up the way you do. So they sometimes make up a fact, a name, a date or even a book that does not exist, and say it confidently. This is called a hallucination. A long, neat, confident answer is not proof; a real check compares it with your textbook, your teacher or another trusted source.

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AI tip

Sounds sure ≠ is true — “check every important AI fact against a trusted source”

  1. A hallucination is a made-up fact, name or source that an AI states as if it were true.
  2. Facts: AI can be wrong, can make up facts and can sound sure while wrong. Myths: AI is never wrong, AI knows everything, confident means correct.
  3. Real checks: match it to the textbook, ask your teacher, find a trusted source, redo the maths yourself. Not checks: it sounds sure, it is long, it looks neat, asking the same AI again.

Use it for: Every time an AI gives you a fact, date, number, quote or source for school work.

Worked example: 📚 An AI chatbot names a book that does not exist. This is called… → a hallucination

  1. The AI made up a book and presented it as real.
  2. A made-up fact stated as true is called a hallucination.

Check: Try it: take one AI-style fact from this lesson’s questions and find it (or prove it wrong) in your textbook ✓

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✏️ Practice

Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.

Right: 0 · Tried: 0

🏁 Lesson 6 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🧐 Hallucination Hunter badge when you pass — and a certificate when you finish all 8 lessons of Part 1 · What AI is. You can still take the test without signing in.

🖨️ AI Hallucination Worksheet

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