orthonormal comments on For progress to be by accumulation and not by random walk, read great books - Less Wrong
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Comments (102)
No, up and down votes are symmetrical. Both should usually be done without explanation.
I disagree; an explanation of a downvote is a lot more helpful to the author than an explanation of an upvote (in addition to the fact that it often mitigates status-based anger), and thus the symmetry is broken. h-H is perhaps exaggerating this principle, but it's perfectly legitimate to say "that comment looked OK to me, what are you seeing?"
seconded, and well put.
Strong second.