Case 015
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.
Casey
“Parker and Noah are both innocent.”
Parker
“Noah is innocent.”
Drew
“Either Parker or Noah is guilty.”
Noah
“Drew is guilty.”
Taylor
“Casey and Parker are both innocent.”
Who is guilty?
Solution: Drew
If Drew is guilty, Drew's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.