Case 037
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.
Blake
“Either Peyton or Noah is guilty.”
Elliot
“Blake is guilty.”
Peyton
“Elliot is innocent.”
Noah
“Elliot and Peyton are both innocent.”
Cameron
“Neither Elliot nor Peyton is guilty.”
Who is guilty?
Solution: Blake
If Blake is guilty, Blake's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.