Case 303
The Disabled Camera
A security camera was deliberately switched off.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Harper
“Kai is innocent.”
Kai
“Kendall and Drew are both innocent.”
Kendall
“Either Kai or Peyton is guilty.”
Drew
“Neither Harper nor Kendall is guilty.”
Peyton
“Either Kai or Kendall is guilty.”
Who is guilty?
Solution: Peyton
If Peyton is guilty, Peyton's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.