Case 237
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.
Drew
“Elliot is innocent.”
Elliot
“Dakota is innocent.”
Dakota
“Drew and Emery are both innocent.”
Emery
“Drew is innocent.”
Reese
“Dakota is guilty.”
Who is guilty?
Solution: Reese
If Reese is guilty, Reese's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.