[tunesmith]

At a much lower level, I've been having fun hacking away at my Concludia side project over time. It's purely proposition level and will eventually support people being able to create their own arguments and contest others. http://concludia.org/

[sundarurfriend]

Nice! I've wanted to build something like this for a long time. It requires good faith argument construction from both parties, but it's useful to make the possibility available when you do find the small segment of people who can do that.

[jnwatson]

Very cool! I've had this idea for 20 years. I'm glad I didn't get around to making it.