Case 069
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.
Quinn
“Jules is guilty.”
Noah
“Blake and Avery are both innocent.”
Blake
“Neither Noah nor Avery is guilty.”
Jules
“Noah is guilty.”
Avery
“Noah and Blake are both innocent.”
Who is guilty?
Solution: Jules
If Jules is guilty, Jules's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.