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I think that Mark Twain's description of a river really does fit the sort of river that I was thinking fit for a discription of this class. It has to be navigated and there are all kinds of unforseen turns and bends. There is convergence and divergence of streams of thought in relation to the large river as a whole. It is a path that you begin not knowing where it will take you. He conveyed succinctly what I was trying to do when I was explaining our river.