There is. It isn't an official policy, but dupe check only compares to values in some cache somewhere. Duplicate articles are FINE on HN, given that after a tim

There is. It isn't an official policy, but dupe check only compares to values in some cache somewhere. Duplicate articles are FINE on HN, given that after a time period the ability to comment is removed from an article (unless of course, the suggestion is that there is nothing valuable to discuss about something n days after a conversation starts, ever).