Earlier quoted context omitted.
Why on every aggregator does there have to be 'that guy' who thinks it's somehow his job to dig up duplicate posts? Do you comment on various news sites whenever they post an article that the NYTimes covered? It's just... silly. This is the first time I've seen news about this particular 'country', and I'm glad I saw it this time because it is interesting. Duplicates FTW!
Duplicates will always happen, and as you have pointed out, sometimes there is positive value to that. The idea isn't to avoid duplicates, per se, but to try to ensure that the same discussion doesn't get hashed out again and again in different different, parallel and unconnected threads. There have even been cases[0] where the mods explicitly dipped in and moved comments from one submission to another to avoid the "…
I love the idea of stopping the 'split discussion' issue, but I feel like it's at odds with a site like HN where stories fall off of the front page so quickly. I'm not able to read it all day long, and I rarely look at it in the evenings. Especially when we have articles about potential gaming of the article positions, it seems unrealistic to expect that you would have a chance to actually get the real 'news' at any given point without duplicate posts.
What I mean is, there are certainly more than 30 in-progress topics appealing to HN readers. If I look at the front page in the morning and again in the afternoon, I'm only going to get a small subset of the topics that are out there. That's why I appreciate duplicates so much... it's really the only thing that makes a site like HN relevant to the occasional reader.
Anyway, thanks for supporting me even though I wasn't the most ambassadorial. :)