In the actual guidelines found here: http://ycombinator.com/newsguidelines.html it doesn't say anything about well actually comments. It says be smart in your discussions and don't just get opinionated, it says to present facts and actually address the thing that you're arguing over. I believe having proper arguments and discussions is one of the core things HN is about. It lets people learn and see other points of view. If you don't like a comment just downvote it.
Furthermore, the character of 'well-actually' comments are that the orignal comment was close to, or intended to be close to, a certain fact, and the well-actualer is pedantically correcting the original without adding any substantial value to the conversation.
This is not what happened here. rvkennedy did not make a statement of fact, he made an off-the-cuff remark. eldude challenged the substance and tone of that remark in order to prevent further misrepresentation of the point. He corrected and clarified the remark in a clear and substal way, thus falling well outside of the 'well-actually' category.
Oh dear. I've spent way too much time reading SCOTUS rulings/blogs today.
This is also such a terrific "well-actually" I'm glad he broke this non-existant rule. It is absolutely maddening to hear people misinterpret the 3/5ths rule, and I'm convinced basically no one in this country understands it.
In the actual guidelines found here: http://ycombinator.com/newsguidelines.html it doesn't say anything about well actually comments. It says be smart in your discussions and don't just get opinionated, it says to present facts and actually address the thing that you're arguing over. I believe having proper arguments and discussions is one of the core things HN is about. It lets people learn and see other points of view. If you don't like a comment just downvote it.