Study guides › Level 6 · Master

Truth-tellers and fibbers

Level 6 · for three people who each always tell the truth or always fib

💡 The idea

Each person is one kind for the whole puzzle. A truth-teller’s words are true; a fibber’s words are false. Only one mix of kinds makes everyone’s words fit.

🪜 The steps

1. Pick one person and pretend they tell the truth.
2. Follow what their words say about the others.
3. Check every sentence. If one doesn’t fit, your guess was wrong: try that person as a fibber.

⚠️ Watch out

• “X and I are the same kind” is true when both are honest or both fib.
• If someone says “I am a fibber”, that can never happen: no one in these puzzles can say it.

🎯 Try these

1. Ana says: “Bo fibs.” Bo says: “Ana fibs.” Can both tell the truth?
2. Ana says: “Bo and I both fib.” What is Ana?

Answers: 1) No: they are opposite kinds 2) A fibber (a truth-teller could never say it)

This guide is also in the 10LogicQ app: tap “📖 Study guide” after a puzzle.