Case 031
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.
Blake
“Either Riley or Alex is guilty.”
Riley
“Blake is guilty.”
Kai
“Neither Riley nor Alex is guilty.”
Alex
“Kai and Hayden are both innocent.”
Hayden
“Riley and Kai are both innocent.”
Who is guilty?
Solution: Blake
If Blake is guilty, Blake's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.