THE LOST WIRING DIAGRAM

THERE IS A SMALL BUILDING WITH NO WINDOWS THAT HAS THREE LIGHTS INSIDE. EACH LIGHT IS CONTROLLED BY ITS OWN SWITCH ON THE OUTSIDE OF THE BUILDING. THERE IS NO WAY OF KNOWING WHICH LIGHT TURNS ON WHEN A SWITCH IS FLIPPED FROM THE OUTSIDE, AND YOU CANNOT SEE THE WIRING. YOU HAVE ONE CHANCE TO DETERMINE WHICH SWITCH CONTROLS WHAT LIGHT,, BECAUSE ONCE YOU ENTER THE BUILDING YOU CANNOT GO BACK OUTSIDE AND TRY ANOTHER SWITCH. SO, FLIP THE SWITCH (ES) YOU WANT, THEN ENTER THE BUILDING TO DETERMINE WHICH SWITCH CONTROLS EACH LIGHT.

FROM: TOM LENSCH