At a reply depth of 4, the parent can never have the last laugh.. unless he replies to himself.
Or, if that reply link/button doesn't show up, click on the timestamp of the comment you wish to rebut/remark/comment, then you will see a comment box with button.
alt Hacker News
Or, if that reply link/button doesn't show up, click on the timestamp of the comment you wish to rebut/remark/comment, then you will see a comment box with button.