Earlier quoted context omitted.
> e.g. someone should be able to criticize Elon Musk without being downvoted to hell. I wish downvoting wouldn't be allowed without a "reply" to parent post, that way if I'm being downvoted nonstop I know why. Sometimes I get downvoted like crazy and have no clue as to why. Or even if I guess it doesn't add to the conversation to just shut me out because you disagree without teaching me why. I wonder how HN would be…
A hypothetical social-discussion model I've been meaning to build an MVP of: 1. there are replies and up-voting, but no down-voting; 2. you can classify a comment reply, at time of posting, as a "rebuttal"; 3. up-voting a rebuttal comment will also be considered as down-voting its parent; 4. the aggregate score of a subthread is calculated as a Euclidean distance, with all the positively-scored comments as dimensions…
I often upvote both a comment and its rebuttal, because in many debates I have no dog in the race and I often find that people on both sides have valuable or otherwise interesting insights. Even if I don't agree with them completely, I sometimes find that I'm able to view an issue from another perspective that I hadn't considered before.
Not to mention, many debates really just don't have a clear answer, and to pit commentors against each other like that is to enable one of them to be declared "winner", which I think would be misleading in many cases.