Case 328
The Cut Cable
A network cable was cut in a restricted room.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Finley
“Either Emery or Sam is guilty.”
Emery
“Neither Sam nor Harper is guilty.”
Sam
“Harper is innocent.”
Harper
“Neither Emery nor Sam is guilty.”
Morgan
“Emery and Sam are both innocent.”
Who is guilty?
Solution: Finley
If Finley is guilty, Finley's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.