TBH this idea that each comment should stand individually on its (including HN's downplaying of the usernym with grey) seems like it contributes to some of the problems with modern discourse. When someone I know says something challenging, I know the context they're coming from, what I do agree with them on, what skills of theirs I respect, etc. Whereas message board comments are just tiny slivers of information with which you can agree or disagree.
Oh for sure. There's nothing wrong with people getting to know each other, and their views, by reading through past comments.
It's just not in the intended spirit of HN to track down contradictions and use them as gotchas in arguments. That's a narrower point. I've added an edit to the GP comment to clarify that.
