CASE ZERO
Case 200

Who is guilty?

Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.

Ada: “None of Ada, Mia or Ben is guilty.”
Luke: “The guilty person is one of Ada, Mia or Skye.”
Mia: “The guilty person is either Ada or Ben.”
Ben: “Mia is innocent.”
Skye: “Neither Ben nor Skye is guilty.”
Random case
Solution: Ada 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.