One of the recurring philosophical questions is: 'Does a falling tree in the forest make a sound when there is no one to hear?' Which says something about the nature of philosophers , because there is always someone in a forest. It may only be a badger, wondering what that cracking noise was, or a squirrel a bit puzzled by all the scenery going upwards, but someone.
Terry PratchettDedication: My thanks to the people who showed me that opera was stranger than I could imagine. I can best repay their kindness by not mentioning their names here.
Terry Pratchett