CASE ZERO
Case 082

Who is guilty?

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

Ava: “Neither Eli nor Zoe is guilty.”
Eli: “Ava is innocent.”
Nora: “The guilty person is either Ava or Eli.”
Miles: “Neither Ava nor Miles is guilty.”
Zoe: “The guilty person is one of Ava, Eli or Nora.”
Random case
Solution: Nora 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.