Case 216
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.
Peyton
“Neither Drew nor Lane is guilty.”
Drew
“Peyton is innocent.”
Kendall
“Peyton is guilty.”
Lane
“Kendall is guilty.”
Sam
“Lane is innocent.”
Who is guilty?
Solution: Kendall
If Kendall is guilty, Kendall's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.