Case 264
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.
Avery
“Blake and Kendall are both innocent.”
Peyton
“Either Avery or Frankie is guilty.”
Blake
“Either Frankie or Kendall is guilty.”
Frankie
“Either Peyton or Kendall is guilty.”
Kendall
“Avery and Peyton 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.