[cakedoggie]

> ever resulting in someone saying "Hmm, that's a great point, maybe I'll rethink my position. I guess I am a dumbass just like you described. Thanks".

Because there is no magical system that does this, and expecting it is slightly silly.

[indubitable]

Discussion alone suffices to enable people to regularly change their views. The problem is that Twitter is specifically built to inhibit reasoned discussion. It's meant for one liners and zingers. This tiny post is now at 315 characters, well over twice as long as any thought capable of being expressed on Twitter.

[rdtsc]

HM is pretty good I think, one of the best compared to reddit and others I've seen. Community here does encourage discussion and throwing insults and running away is flagged pretty quickly.