Intel x86 considered harmful – survey of attacks against x86 over last 10 years

Why the second post?

https://news.ycombinator.com/item?id=10458311

https://news.ycombinator.com/item?id=10223645 "We've adjusted the dupe detector to reject fewer URLs...[snip/].. Allowing reposts is a way of giving high-quality stories multiple chances at making the front page. Please do this tastefully and don't overdo it."

Considering that this second post got much more traction than the first, I don't see anything wrong.

Both links were submitted within a minute of each other and were both on the front page at the same time.

I don't think posting two links 1 minute apart was the idea behind this rule change.

Both were submitted by the same person

In this case the same submitter posted two versions of the story:

http://blog.invisiblethings.org/papers/2015/x86_harmful.pdf

http://blog.invisiblethings.org/2015/10/27/x86_harmful.html

Not a great approach; one ought just to pick the better of the two, which in this case is the html, because it gives more background, loads faster, and links to the pdf.

General remark: I doubt that we'll make the dupe detector sophisticated enough to catch a case like this, but I do think we'll add software support for users to identify dupes when they see them. That's what happens informally already (as you all did in this thread, and by flagging the other post) so the shortest path to better deduplication for HN seems to be: write software to make community contribution easy. Also I kind of like the idea of giving a karma point to the first user who correctly links a given pair of posts.