Why should we upvote or downvote a comment?
limmeau: The two extremes are:1) everyone upvotes to agree (and only to agree), and downvotes to disagree (and only to disagree). Then the score on a contribution measures its proximity to the average opinion.2) everyone upvotes signal and downvotes noise. Then the score on a contribution measures its relevance to HN readers.Since I don't care about average opinions but much about relevance, I upvote and downvote by rule 2).