Case 056
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.
Morgan
“Either Noah or Kai is guilty.”
Noah
“Kai and Emery are both innocent.”
Kai
“Morgan is guilty.”
Jules
“Either Morgan or Kai is guilty.”
Emery
“Neither Kai nor Jules is guilty.”
Who is guilty?
Solution: Morgan
If Morgan is guilty, Morgan's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.