CASE ZERO
Case 149

Who is guilty?

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

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