>>knowav+S2
I post comments like
https://news.ycombinator.com/item?id=8404139 to indicate that a story has already been discussed on HN. The rule for reposts is that we demote them as dupes if the item has had significant attention in about a year. Sometimes there are borderline calls, but this isn't one: 152 points and 156 comments is significant attention and 1 day ago is less than a year.