Case 362
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.
Riley
“Either Logan or Peyton is guilty.”
Logan
“Neither Reese nor Elliot is guilty.”
Peyton
“Reese is guilty.”
Reese
“Logan and Elliot are both innocent.”
Elliot
“Neither Logan nor Reese is guilty.”
Who is guilty?
Solution: Peyton
If Peyton is guilty, Peyton's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.