That's what I thought. But it didn't work. For example, this very topic never came up in the ask section. I have tried it a few times before too. And there are other topics in the ask section which are not prefixed with this. http://news.ycombinator.net/item?id=1395561 http://news.ycombinator.net/item?id=1396900 http://news.ycombinator.net/item?id=1397003 http://news.ycombinator.net/item?id=1396876