Case 038
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.
Harper
“Cameron is innocent.”
Cameron
“Either Riley or Avery is guilty.”
Riley
“Either Harper or Cameron is guilty.”
Frankie
“Harper and Cameron are both innocent.”
Avery
“Either Riley or Frankie is guilty.”
Who is guilty?
Solution: Riley
If Riley is guilty, Riley's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.