Good point, Gnarf. Okay, how can you determine which switch goes to which light while making only one trip up and downstairs?
I should also mention that you're alone, with no fancy technology. And you can't see the attic either, so you can't just flip on the lights, look up, and see what happened. And no leaving a webcam set up to monitor the results, no having a friend watch and tell you, no outside assistance at all. It's just you, the switches, the lights, and several flights of stairs.
How would you do it?
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