This is probably the 8th or 9th time this has been posted to Hacker News. I don't understand why there are so many duplicate posts - can't we get a filter for

This is probably the 8th or 9th time this has been posted to Hacker News. I don't understand why there are so many duplicate posts - can't we get a filter for this? Seems pretty simple, just reject duplicates, especially this many.