CASE ZERO
Case 281

Who is guilty?

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

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