Case 160
The Empty Safe
A small office safe was found empty in the morning.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Parker
“Emery and Alex are both innocent.”
Emery
“Neither Parker nor Morgan is guilty.”
Dakota
“Either Parker or Morgan is guilty.”
Morgan
“Alex is innocent.”
Alex
“Emery and Morgan are both innocent.”
Who is guilty?
Solution: Dakota
If Dakota is guilty, Dakota's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.