Case 096
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.
Jules
“Noah is innocent.”
Reese
“Neither Jules nor Sam is guilty.”
Sam
“Reese is innocent.”
Frankie
“Either Sam or Noah is guilty.”
Noah
“Neither Jules nor Reese is guilty.”
Who is guilty?
Solution: Frankie
If Frankie is guilty, Frankie's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.