Case 311
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Isla: “Freya is guilty.”
Sam: “The guilty person is either Isla or Freya.”
Freya: “The guilty person is one of Isla, Sam or Freya.”
Cole: “The guilty person is one of Isla, Sam or Eva.”
Eva: “Neither Cole nor Eva is guilty.”
Random case Solution: Isla 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.