Agreed . . . you have to take into consideration that since we, as humans, don't know anything as an absolute, that perhaps there is nothing existing outside of our little worlds. Ergo, if I'm not in the woods to hear the tree fall, then perhaps it doesn't make a sound. I hate eastern philosophy, but in terms of philosophy itself, there's no absolute that the tree DOES make a sound despite the lack of someone's comprehending that it does.

The point is, you don't know. You might be able to reason one way or the other . . . yes the tree makes a sound . . . but you don't know. It's an impossible situation, ergo there's no answer to be derived.