The Troll Brothers

There are four troll brothers – Wudhor, Xhaqan, Yijlob, and Zrowag.

  • Wudhor always says the truth.
  • Xhaqan always lies.
  • Yijlob lies or says the truth unpredictably.
  • Zrowag is deaf and never answers.

You must ask these brothers four YES/NO questions (one troll per question), and figure out their names. What questions would you ask?

Source: Puzzling StackExchange

Coming soon.