Case 026
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.
Finley
“Frankie is guilty.”
Frankie
“Either Finley or Dakota is guilty.”
Hayden
“Finley and Lane are both innocent.”
Dakota
“Finley and Hayden are both innocent.”
Lane
“Finley and Dakota are both innocent.”
Who is guilty?
Solution: Frankie
If Frankie is guilty, Frankie's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.