This post was popular, but the idea never got picked up. Let's have an experimental open thread this month!
Top level comments would be claims. Second level comments would be discouraged from directly saying that someone is wrong and instead encouraged to ask them questions instead to get them to think
Let top level comments be debatable claims, first tier responses be questions, second tier answers, responses, answers, etc. Try to go as deep as possible, I'd expect an actual update to be increasingly likely to happen as you continue the conversation.