Case 348
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.
Peyton
“Blake is innocent.”
Drew
“Neither Logan nor Blake is guilty.”
Logan
“Either Peyton or Parker is guilty.”
Blake
“Either Logan or Parker is guilty.”
Parker
“Either Peyton or Logan is guilty.”
Who is guilty?
Solution: Parker
If Parker is guilty, Parker's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.