Imagine you enter a parlor. You come late. When you arrive, others have long preceded you, and they are engaged in a heated discussion, a discussion too heated for them to pause and tell you exactly what it is about. In fact, the discussion has begun long before any of them got there, so that no one present is qualified to retrace for you all the steps that have gone on before. You listen for a while, until you decide that you have caught the tenor of the argument, then you put in your oar. Someone answers, you answer [her]; another comes to your defense; another aligns himself against you ... The hour grows late, you must depart. And you do depart, with the discussion still vigorously in progress. (110-11) 

-- Kenneth Burke, The Philosophy of Literary Form: Studies in Symbolic Action. Berkeley: U of California P, 1973.