/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: johnnydorsch https://cdn.slidesharecdn.com/profile-photo-johnnydorsch-48x48.jpg?cb=1656689874 Facebook serves as an introduction. Therefore any introduction on my part would be superfluous. What sort of preface solely declares itself to be inappropriate? - The answer to that can be found here: Hegel(PS;1)