If a phenomena truly exists it is either one thing or many things. No phenomena can be one thing because no phenomena is a single thing, it has parts. It has a front, a middle or a back, a beginning, duration and end, etc. Neither can it be many things. Each of the parts can themselves be divided into smaller units, ad infinitum. We never reach partless units to serve as building blocks of time and space. A string has extension, a moment has extension. Therefore all phenomena do not exist from their own side, they are like dreams, reflections, echoes, fictions, images and appearances.