Talisse and I have a post over at 3QuarksDaily on why the dialogical perspective on argument is important.  I’m thinking that the line there about turn-taking is a good way to characterize what goes wrong with straw-manning in specific cases, only though.  For example, weak-manning isn’t part of a turn-taking exchange, but mostly a form of picking those with whom to play the game. There’s more to think about here.