Case 199
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Isla: “Isla is innocent.”
Sam: “The guilty person is one of Isla, Freya or Cole.”
Freya: “None of Isla, Sam or Eva is guilty.”
Cole: “The guilty person is either Isla or Freya.”
Eva: “The guilty person is one of Sam, Cole or Eva.”
Random case Solution: Cole 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.