CASE ZERO
Case 280

Who is guilty?

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

Ada: “Mia is guilty.”
Luke: “Luke is innocent.”
Mia: “Ben is guilty.”
Ben: “The guilty person is either Mia or Ben.”
Skye: “The guilty person is one of Ada, Luke or Mia.”
Random case
Solution: Mia 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.