Case 250
The Broken Seal
A tamper seal on a storage crate was cut overnight.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Drew
“Neither Peyton nor Emery is guilty.”
Jordan
“Harper is guilty.”
Peyton
“Jordan and Emery are both innocent.”
Emery
“Drew and Peyton are both innocent.”
Harper
“Drew is guilty.”
Who is guilty?
Solution: Harper
If Harper is guilty, Harper's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.