Existence

If a tree falls in the woods, but there's no one around to hear it, does it still make a sound? Isn't that the strangest thing to wonder about? Yet, it has received a lot of discussion. I have a different version.  If a person writes in her blog, but there's no one around to read it, does it exist? Hmmmm....  Think perhaps it's time for bed. WAY past even!  :)