#2 When looking at the oft-quoted passage by Kenneth Burke:  Green quotes it again to emphasize the idea that an argument is not something you can jump right into discussion about, it needs to be well gathered information, that is organized in a way that people can understand what you are discussing. Also I think it makes the point that with out all of the facts and information one can not fully understand all parts of the argument making it impossible to add your own ideas, unless you are completely educated on the subject matter.

The metaphor is that a guy comes into a parlor and hears a table of conversing going on they seem to being in a deep discusion about a topic, they are so far into the discussion that know one can explain in.  This presents writing in a way because when you are writing you need to make your arguments clear enough for everyone to follow even if they are just catching the tail end of your presentation or  paper. 

  #3 Framing: is a metaphor for describing the lens , or perspective, or the view point from which a writer will present their arguments.  The metaphor relates the way a writer uses language to the way a photographer frames a picture to portray the important parts of the photo. Framing allows a writer express the mood they want the reader to get from their article.