Comment by tunesmith

https://concludia.org/ - I've mentioned it here before, it's a site to help people reason through and understand arguments together. No real business purpose for it yet, it's more an idea I've had for years and have been wanting to see it through to something actually usable. You can graphically explore arguments, track their logical sufficiency/necessity, and make counterpoints. It's different than other types of argument theory that just have points "in favor" and "against" because of how it tries to propagate logical truth and provability.