Check out http://idebate.org/debatabase http://idebate.org/debatabase I knew it as debatepedia a while ago. Choose a topic and click on a subtopic. The old vers

Check out http://idebate.org/debatabase http://idebate.org/debatabase I knew it as debatepedia a while ago. Choose a topic and click on a subtopic. The old version had a argument map style debates. There is already a mention of argument maps in one of the comments which is another great tool.