CASE ZERO
Case 157

Who is guilty?

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

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