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etcet | karma 679 | avg karma 3.06 · 2014-11-10 16:03:36

Wouldn't it be better to upvote the disagreements you agree with?

tptacek | karma 394296 | avg karma 6.04 · 2014-11-10 22:13:17+00:00

This isn't my argument, but you're missing its point. Think of disagreement downvotes as a pressure release valve for the downvoter. The idea is to prevent you from expressing your disagreement in an unproductive comment.