This tool is still very primitive (i'm still working on it) but it does what you're looking for: http://consensus-148618.appspot.com/ http://consensus-148618.a

This tool is still very primitive (i'm still working on it) but it does what you're looking for: http://consensus-148618.appspot.com/ http://consensus-148618.appspot.com/ You construct an argument like a proof, with supporting arguments. People can share their opinions on each step of your argument. It doesn't allow direct back and forth yet; you'd ahve to pass the link around.