Case 118
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.
Emery
“Neither Elliot nor Riley is guilty.”
Cameron
“Either Riley or Marley is guilty.”
Elliot
“Emery and Marley are both innocent.”
Riley
“Emery is innocent.”
Marley
“Riley is innocent.”
Who is guilty?
Solution: Cameron
If Cameron is guilty, Cameron's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.