Case 201
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.
Riley
“Neither Casey nor Morgan is guilty.”
Casey
“Either Riley or Logan is guilty.”
Kai
“Casey is innocent.”
Logan
“Casey is guilty.”
Morgan
“Neither Casey nor Kai is guilty.”
Who is guilty?
Solution: Logan
If Logan is guilty, Logan's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.