CASE ZERO
Case 330

Who is guilty?

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

Ava: “Neither Eli nor Nora is guilty.”
Eli: “None of Ava, Eli or Nora is guilty.”
Nora: “The guilty person is either Nora or Miles.”
Miles: “Zoe is guilty.”
Zoe: “None of Ava, Nora or Zoe is guilty.”
Random case
Solution: Miles 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.