OK, if this is a dupe then please provide the link it dupes. (I do genuinely want to see the previous commentary...) Or sockpuppet-downvote me again, whatever.
If HN detects a duplicate, it sends you to the previous submission. However, HN's duplicate detector is porous by design. We deliberately leave the door open for reposts, if a story hasn't had significant attention yet, and ask people not to exploit the loophole. This is so genuinely interesting articles can have multiple cracks at the bat.