http://www.perlmonks.org?node_id=259511


in reply to Re: Re: Re: What's that noise?
in thread What's that noise?

Well, if we're going to get all quantum about it, then what about the fact that making an observation changes the thing observed. So if a tree falls and nobody is around to hear it, then it makes a different sound than if someone was there.

Of course, who's to say that the tree even fell at all. I say it is both fallen and standing until someone walks in the forest and checks :)