In this article Porter talks about that all of the texts are considered intrtextual. He uses or distinguishes two types of intertextuality: iterability and presupposition. Basically iterability is citation in its broadest sense, or repeatability, so anything that could be considered borrowed in any sense. Then presupposition, refers to assumptions a text makes about its referent, its readers, and its context to parts of the text which are reading, but which are not explicitly there, presupposition may be considered as the reality that the text creates by itself. For porter writing in society is considered successful. later on in the text Porter talks about Discourse community as potentially more comprehenseive than that of audience. Also defines the term as group of individuals bound by a common interest who communicate through approved channels and whose discourse is regulated. Basically this is more directed towards the group of people that share the same textuality goals, how their writing are related with each other. I agree with this article but I did not like it because is kind of boring but it gives you really important concepts about the plagiarism and discourse community and how they may be connected but at the end they are not the same thing but can be related with each other. Manuel Lucero