I'll help you "get it" then.

In WinMX if you had a download that had no sources you could right click and have WinMX search for alternates where the only results you would find where the ones with the exact byte size match, plus file extention. When I have used this function I would never get any results that were not the file I was searching for. Limewire has hundreds, sometimes thousands of results and not one file that matches the file I'm looking for. This is why I deemed it "retarded searches" vs. "smart searches". I apologize if I had confused you.