CASE ZERO
Case 033

Who is guilty?

Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.

Maya: “The guilty person is one of Noah, Lena or Iris.”
Noah: “The guilty person is either Lena or Iris.”
Lena: “The guilty person is one of Maya, Noah or Owen.”
Owen: “None of Maya, Lena or Iris is guilty.”
Iris: “Lena is innocent.”
Random case
Solution: Noah is guilty. Testing each possible culprit leaves this as the only assignment where the culprit's statement is false and all four innocent statements are true.