CASE ZERO
Case 238

Who is guilty?

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

Amira: “Hugo is innocent.”
Jack: “Mae is guilty.”
Tess: “Jack is guilty.”
Hugo: “None of Amira, Tess or Mae is guilty.”
Mae: “The guilty person is either Jack or Mae.”
Random case
Solution: Jack 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.