Case 235
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.
Hayden
“Either Harper or Drew is guilty.”
Reese
“Hayden is innocent.”
Harper
“Reese and Emery are both innocent.”
Emery
“Neither Reese nor Harper is guilty.”
Drew
“Hayden 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.