Case 177
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.
Rowan
“Reese is guilty.”
Cameron
“Frankie and Noah are both innocent.”
Frankie
“Reese is innocent.”
Noah
“Either Rowan or Frankie is guilty.”
Reese
“Neither Cameron nor Frankie is guilty.”
Who is guilty?
Solution: Rowan
If Rowan is guilty, Rowan's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.