Case 072
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.
Frankie
“Either Kendall or Reese is guilty.”
Hayden
“Neither Kendall nor Alex is guilty.”
Kendall
“Either Frankie or Reese is guilty.”
Reese
“Either Frankie or Kendall is guilty.”
Alex
“Kendall and Reese are both innocent.”
Who is guilty?
Solution: Frankie
If Frankie is guilty, Frankie's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.