CASE ZERO
Case 344

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