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There are three persons **A**,**B** and **C**, each a knight or a knave. **A** and **B** make the following statements:

**A** : "All of us are knaves."

**B** : "Exactly one of us is a knight."

What is **C**, a knight, or a knave?

A knight is a person who always speaks the truth & a knave always speaks lies.

This problem is the part of my set Is This What You Call Logic?!

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