Case 347
The Stolen Prototype
A prototype vanished from a secured workroom.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Jordan
“Taylor is guilty.”
Taylor
“Either Jordan or Lane is guilty.”
Lane
“Taylor and Casey are both innocent.”
Morgan
“Lane and Casey are both innocent.”
Casey
“Either Jordan or Morgan is guilty.”
Who is guilty?
Solution: Jordan
If Jordan is guilty, Jordan's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.