Case 135
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.
Frankie
“Alex is guilty.”
Drew
“Either Frankie or Dakota is guilty.”
Alex
“Drew and Dakota are both innocent.”
Dakota
“Drew and Jordan are both innocent.”
Jordan
“Alex and Dakota are both innocent.”
Who is guilty?
Solution: Frankie
If Frankie is guilty, Frankie's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.