Jacques Derrida

As Perelman suggests, rhetoric has always been concerned with understanding the basic nature of an audience. Considering this view, the perennial question posed by rhetoric might be: How does one discourse properly with an audience? Using the terminology supplied by Bitzer, this query might be rephrased to read: How does one "uncover and make available the public knowledge needed in our time and give body and voice to the universal public". Of key importance is that the rhetorician must secure a base of knowledge that will allow communication to commence between a speaker and an audience. If discourse is to be successful a speaker must address an audience in a style that can be understood, and therefore must substantiate all social intercourse on knowledge that is "public" or held in common. At first this might sound quite pedestrian, yet throughout the history of rhetoric this assumption has proven to be quite problematic

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