CASE ZERO
Case 328

Who is guilty?

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

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