Case 269
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.
Quinn
“Neither Taylor nor Logan is guilty.”
Taylor
“Neither Quinn nor Logan is guilty.”
Blake
“Logan is guilty.”
Logan
“Either Taylor or Blake is guilty.”
Morgan
“Quinn is innocent.”
Who is guilty?
Solution: Blake
If Blake is guilty, Blake's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.