Case 316
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.
Alex
“Morgan is guilty.”
Avery
“Neither Marley nor Morgan is guilty.”
Marley
“Neither Sam nor Morgan is guilty.”
Sam
“Marley and Morgan are both innocent.”
Morgan
“Alex is guilty.”
Who is guilty?
Solution: Alex
If Alex is guilty, Alex's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.