Case 357
The Missing Painting
A framed artwork disappeared from a private hallway.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Dakota
“Either Harper or Marley is guilty.”
Quinn
“Dakota is innocent.”
Harper
“Quinn is guilty.”
Morgan
“Marley is innocent.”
Marley
“Either Dakota or Harper is guilty.”
Who is guilty?
Solution: Harper
If Harper is guilty, Harper's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.