Case 091
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Ruby: “The guilty person is either Mila or Finn.”
Theo: “Theo is innocent.”
Mila: “Jade is innocent.”
Finn: “None of Ruby, Finn or Jade is guilty.”
Jade: “None of Ruby, Mila or Jade is guilty.”
Random case Solution: Finn 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.