Add a comment like: Dupe: https://news.ycombinator.com/item?id=13155146 https://news.ycombinator.com/item?id=13155146 It serves as a note to others to comment

Add a comment like: Dupe: https://news.ycombinator.com/item?id=13155146 https://news.ycombinator.com/item?id=13155146 It serves as a note to others to comment on the other submission. No magic. Sometimes a mod will come by and clean up comments and mark the submission title.