Case 215
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.
Reese
“Kai and Casey are both innocent.”
Cameron
“Kai is guilty.”
Kai
“Casey is innocent.”
Riley
“Neither Reese nor Kai is guilty.”
Casey
“Cameron is guilty.”
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.