To solve this perplexing riddle, you will have to think logically. Not everyone can know it. Can you?
In the house, there is a room with a light bulb inside. The door is closed, and you are out of the room. There are three switches outside the room. Only one of them operates the light bulb, while the other two do nothing. The room has no windows, and there is no way to see into the room or know if the light is on or off when the door is closed.
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