CASE ZERO
Case 113

Who is guilty?

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

Maya: “Owen is innocent.”
Noah: “None of Maya, Noah or Lena is guilty.”
Lena: “The guilty person is one of Maya, Noah or Owen.”
Owen: “None of Maya, Lena or Owen is guilty.”
Iris: “Neither Maya nor Iris is guilty.”
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.