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Considering how debates tend to go in circles, I'm not sure if a DAG is the right data structure

The comments are a DAG. The ideas go in circles.

But I'm not sure you can get an automated map from comments to ideas, no matter what data structure you use...

HN just doesn't have enough controls. I don't just want to reply to you, I want to elevate this comment so your comment is a reply to it...

(Perhaps you could edit in a circular quote of this... :)