For years we have been debating using xam.de's "Issue Based Argumentation in a Wiki" IBAW. This technique allowed us to gather arguments for crucial decisions in the NEPOMUK project.

Now behold debategraph.org .
Our goal is to make the best arguments on all sides of any debate freely available to all and continuously open to challenge and improvement by all ... A wiki debate visualization tool.

Users can add pro/con arguments and deepen them with sub-arguments:


compare it with an IBAW example:
issue: our coffee machine is broken
* idea: fix it
 * pro: cheap
 * con: takes too much time, we can't live so long without coffee
* idea: buy a new one
 * pro: fast
 * con: expensive
  * issue: we need approval form our director
   * idea: we collect money ourselves