Case 044
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
“Alex is innocent.”
Cameron
“Morgan is guilty.”
Elliot
“Neither Jules nor Alex is guilty.”
Jules
“Morgan and Elliot are both innocent.”
Alex
“Elliot and Jules are both innocent.”
Who is guilty?
Solution: Cameron
If Cameron is guilty, Cameron's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.