Case 356
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 and Casey are both innocent.”
Morgan
“Alex and Parker are both innocent.”
Casey
“Neither Alex nor Parker is guilty.”
Drew
“Either Alex or Morgan is guilty.”
Parker
“Neither Alex nor Morgan is guilty.”
Who is guilty?
Solution: Drew
If Drew is guilty, Drew's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.