Case 099
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.
Drew
“Neither Blake nor Harper is guilty.”
Blake
“Harper is innocent.”
Kendall
“Blake is innocent.”
Harper
“Drew and Blake are both innocent.”
Kai
“Either Blake or Harper is guilty.”
Who is guilty?
Solution: Kai
If Kai is guilty, Kai's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.