If a tree falls in the woods...and no one is around to hear it, does it make a sound?

If a tree falls in the woods...and no one is around to hear it, does it make a sound?
Update: Yeah. Try explaining this to other people at school. Just dont try. It took half an hour. lol Fortunately there is always somebody else who stays awake to keep it going.

But imagine what would happen if we all fell asleep at the same time.
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