Case 279
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Isla: “The guilty person is one of Isla, Sam or Eva.”
Sam: “None of Isla, Sam or Freya is guilty.”
Freya: “The guilty person is one of Sam, Freya or Eva.”
Cole: “The guilty person is either Isla or Eva.”
Eva: “None of Isla, Freya or Eva is guilty.”
Random case Solution: Eva 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.