But I know the answer is answer is something like switching one of the switches on, wait a few minutes, turn the switch off, and then checking to see if the light bulb is warm. If not, go back and try another switch. If the lights are still not warm, then it's the last switch.
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But I know the answer is answer is something like switching one of the switches on, wait a few minutes, turn the switch off, and then checking to see if the light bulb is warm. If not, go back and try another switch. If the lights are still not warm, then it's the last switch.