If a tree exists outside of perception then there is no way for us to know that the tree exists. So then, what do we
mean by existence', what is the difference between perception and reality? Also, people may also say, if the tree exists outside of perception as common sense would dictate, then it will produce sound waves. However, these sound waves will not
actually sound like anything. Sound as it is mechanically understood will occur, but sound as it is
understood by sensation will not occur. So then, how is it known that 'sound as it is
mechanically understood' will occur if that sound is not perceived?