CASE ZERO
Case 246

Who is guilty?

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

Amira: “Neither Hugo nor Mae is guilty.”
Jack: “The guilty person is one of Jack, Tess or Hugo.”
Tess: “Neither Amira nor Tess is guilty.”
Hugo: “Amira is innocent.”
Mae: “Tess is guilty.”
Random case
Solution: Tess 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.