Submitting the canonical URL prevents duplicate submissions to some degree. The earlier submission https://news.ycombinator.com/item?id=6694186 https://news.yc

Submitting the canonical URL prevents duplicate submissions to some degree. The earlier submission https://news.ycombinator.com/item?id=6694186 https://news.ycombinator.com/item?id=6694186 is caught in the fratricide of other submissions of the same story.