> there's no much value in searching in an unknown data, is it? So you know exactly how Google's index works? I think "best effort", whatever it is, is useful

> there's no much value in searching in an unknown data, is it? So you know exactly how Google's index works? I think "best effort", whatever it is, is useful even if I don't know the specifics of what it captures or misses. As long as it returns useful results.