Case 114
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.
Dakota
“Rowan is guilty.”
Lane
“Neither Dakota nor Hayden is guilty.”
Marley
“Dakota and Hayden are both innocent.”
Hayden
“Either Lane or Rowan is guilty.”
Rowan
“Marley is guilty.”
Who is guilty?
Solution: Rowan
If Rowan is guilty, Rowan's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.