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Interesting, all of these have identical links. Usually Hacker News doesn't let you post the same link more than once.

• telemachos 14y ago
  > Usually Hacker News doesn't let you post the same link more than once. I believe that's wrong. From what I've seen, I think that that time is also a factor. After some amount of time, you can repost things with exactly the same link and title. And I believe that it's deliberate (the posts are likely to be new to many people since the population turns over to some degree after x amount of time).
  • 8ig8 14y ago
    Is this true? It sounds like an opportunity for karma bots to re-post popular posts from the past.
  • cawel 14y ago
    And that time period might be at most a month, considering the last post with the exact same link (http://news.ycombinator.com/item?id=5186774 http://news.ycombinator.com/item?id=5186774 ) predates the current post by 31 days.