This chapter argues that for digital writing to respond to posthuman predicament, it must involve more than what people send to one another in the guise of letter-writing humanist friendship. It shows, through the concept of the postscript, how inscribing technologies are also incorporating technologies and how that concept might rewrite knowledge transfer. The chapter proposes that, instead of a perversion of the structure of friendship, digital writing enacts a conversion of the friendship structure. Peter Sloterdijk's "Rules for the Human Zoo: a Response to the Letter on Humanism" offers a productive site wherein the turn from humanism should be located for rhetoric and writing studies. Writing studies often claim that writing is a reflective activity and its teaching should reflect writing as a reflective practice. In an age of digital writing, and social media in particular, friendship has been expanded toward non-exclusive connection.