Case 347
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Ruby: “Neither Ruby nor Finn is guilty.”
Theo: “Ruby is innocent.”
Mila: “Neither Mila nor Finn is guilty.”
Finn: “The guilty person is one of Ruby, Theo or Jade.”
Jade: “None of Ruby, Mila 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.