Remember that you are our guests. We will, at our discretion, delete comments that we find off-topic, derailing, un-civil, slanderous, trollish or troll-feeding, petulant, pestiferous, and/or otherwise obnoxious and non-constructive. If we warn you, stop it. After no more than three warnings, you will find yourself banned, and all your future comments will be immediately deleted. See an error in the post? How clever of you! Email the author. If you comment a correction, expect the comment to disappear with the error. If you are confused about how the specifics of these principles play out in practical terms, you'll find a longer list of rules HERE.