Case 147
Who is guilty?
Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Ruby: “None of Ruby, Mila or Finn is guilty.”
Theo: “The guilty person is one of Ruby, Finn or Jade.”
Mila: “Ruby is guilty.”
Finn: “None of Theo, Mila or Jade is guilty.”
Jade: “The guilty person is either Ruby or Theo.”
Random case Solution: Ruby 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.