Case 171
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Ruby: “None of Ruby, Theo or Finn is guilty.”
Theo: “None of Ruby, Mila or Finn is guilty.”
Mila: “Neither Ruby nor Theo is guilty.”
Finn: “The guilty person is either Ruby or Jade.”
Jade: “None of Ruby, Finn or Jade is guilty.”
Random case Solution: Jade 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.