CASE ZERO
Case 137

Who is guilty?

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

Maya: “The guilty person is either Maya or Iris.”
Noah: “Neither Lena nor Owen is guilty.”
Lena: “The guilty person is either Owen or Iris.”
Owen: “Neither Noah nor Owen is guilty.”
Iris: “Neither Maya nor Iris is guilty.”
Random case
Solution: Iris 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.