Case 024
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.
Morgan
“Hayden and Riley are both innocent.”
Hayden
“Neither Kendall nor Riley is guilty.”
Harper
“Morgan is guilty.”
Kendall
“Either Harper or Riley is guilty.”
Riley
“Either Harper or Kendall is guilty.”
Who is guilty?
Solution: Harper
If Harper is guilty, Harper's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.