Computer-Supported Collaborative Argumentation - a resource site about that subject (from the academic perspective). So, they touch upon mapping arguments. A Quote : #

People often resist having to make their reasoning explicit (for all sorts of reasons, but one being that it’s just plain hard cognitively). How can we devise representations and user interfaces that make this easier?

• http://standpedia.com/ “Standpedia’s purpose is to show the different ways people answer hard questions.” #
• "Truth Mapping: a tool to elevate debate"