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Usually it does de-dupe any submission with "significant attention", but I'm not sure what the threshold for that is.

I'd think the submissions from two days ago (206 points, 93 comments) would have qualified. (It's the exact same URL so that's not why it wasn't de-duped either.)

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

Pretty sure dedupe is done manually by u/dang.

Yes, he can manually merge duplicate submissions and their comments.

But there's times when I've submitted items that are dupes and it just takes me to the recent submission and adds an upvote. Now here's something weird: I just tested this by submitting the URL from this submission with the same title and it immediately took me to the discussion from two days ago.

So I'm really confused how this dupe got through.

Why dedup? Old forgotten things are as good as new :)

2 years might be OK, but not 2 days as in this case.

I'm ok with dupes. But cross-linking should at least be automatic.

i use the open source Glider frontend on Android and it shows related posts automatically. recommended.

Isn't this intentional? How would deduping work?