CASE ZERO
Case 285

Who is guilty?

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

Sofia: “Neither Ezra nor Cleo is guilty.”
Max: “The guilty person is either Lily or Cleo.”
Lily: “None of Sofia, Lily or Cleo is guilty.”
Ezra: “Cleo is innocent.”
Cleo: “The guilty person is either Lily or Ezra.”
Random case
Solution: Lily 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.