Case 255
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Isla: “Neither Isla nor Sam is guilty.”
Sam: “None of Isla, Freya or Cole is guilty.”
Freya: “Sam is innocent.”
Cole: “None of Sam, Freya or Cole is guilty.”
Eva: “None of Isla, Cole 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.