Case 109
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.
Taylor
“Marley and Morgan are both innocent.”
Logan
“Taylor is guilty.”
Noah
“Marley is innocent.”
Marley
“Noah and Morgan are both innocent.”
Morgan
“Either Logan or Noah 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.