Regarding the sibling dead comment, it is not uncommon that comments are dead from start, not because they were downvoted in this thread. I don't know, but I i

Regarding the sibling dead comment, it is not uncommon that comments are dead from start, not because they were downvoted in this thread. I don't know, but I imagine it is one of the HN automated moderation actions, based on previous downvotes of that user comments. There is "vouche" feature to minimize unfairness in these cases. If you do not agree that a particular comment should be dead from start, you can click on the timestamp (to go to the permanent link of the comment) and click on vouche. I do this sometimes. I did now for the mentioned comment (from draw_down ) because I agree with you that it is a valuable comment and it is not dead anymore.