Case 128
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.
Jules
“Neither Drew nor Morgan is guilty.”
Drew
“Jules and Morgan are both innocent.”
Kendall
“Jules is innocent.”
Morgan
“Drew and Kendall are both innocent.”
Noah
“Either Drew or Kendall is guilty.”
Who is guilty?
Solution: Noah
If Noah is guilty, Noah's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.