If you replied with a correction, it's implicit that you disagree, and then downvotes would be redundant. I think one liners, unless they are reminders of some

If you replied with a correction, it's implicit that you disagree, and then downvotes would be redundant. I think one liners, unless they are reminders of something that's universally obvious, are worse than no comment at all, because they can't contain much information.