Case 088
The Stolen Watch
A valuable watch disappeared during a private gathering.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Morgan
“Frankie is guilty.”
Taylor
“Either Morgan or Drew is guilty.”
Drew
“Taylor and Reese are both innocent.”
Reese
“Neither Taylor nor Frankie is guilty.”
Frankie
“Neither Drew nor Reese 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.