Case 113
The Broken Seal
A tamper seal on a storage crate was cut overnight.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Rowan
“Jules and Emery are both innocent.”
Jules
“Neither Emery nor Kai is guilty.”
Emery
“Neither Rowan nor Jules is guilty.”
Quinn
“Kai is guilty.”
Kai
“Rowan and Jules are both innocent.”
Who is guilty?
Solution: Quinn
If Quinn is guilty, Quinn's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.