Case 171
The Stolen Prototype
A prototype vanished from a secured workroom.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Dakota
“Jordan is innocent.”
Sam
“Dakota and Reese are both innocent.”
Jordan
“Dakota is innocent.”
Reese
“Dakota and Sam are both innocent.”
Lane
“Either Dakota or Jordan is guilty.”
Who is guilty?
Solution: Lane
If Lane is guilty, Lane's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.