Case 211
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.
Kendall
“Peyton and Kai are both innocent.”
Casey
“Kendall is guilty.”
Emery
“Casey is guilty.”
Peyton
“Neither Kendall nor Emery is guilty.”
Kai
“Kendall is innocent.”
Who is guilty?
Solution: Casey
If Casey is guilty, Casey's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.