Also, the way HN is designed the dupe-check only works on the last N posts (that are in memory), so if you wait a while you can resubmit without any of the tric

Also, the way HN is designed the dupe-check only works on the last N posts (that are in memory), so if you wait a while you can resubmit without any of the tricks others have mentioned. You'll need to wait over a week, though (not sure the exact time).