Case 071
The Missing File
A signed contract file vanished from the archive.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Hayden
“Morgan is innocent.”
Reese
“Neither Morgan nor Taylor is guilty.”
Morgan
“Taylor is innocent.”
Noah
“Either Hayden or Reese is guilty.”
Taylor
“Reese and Morgan are both innocent.”
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.