This is the sort of discussions I love best on HN: I read a thoughtful comment and have no choice but upvote it because it's very thought provoking and I'm nod

This is the sort of discussions I love best on HN: I read a thoughtful comment and have no choice but upvote it because it's very thought provoking and I'm nodding all the way through it. Then I read the opponent's comment ... and feel the same way!