It's because we've been training to understand that "if it isn't on Google, it doesn't exist". That doesn't seem to be true though (see http://en.wikipedia.org/

It's because we've been training to understand that "if it isn't on Google, it doesn't exist". That doesn't seem to be true though (see http://en.wikipedia.org/wiki/Invisible_Web http://en.wikipedia.org/wiki/Invisible_Web), but in practical terms, it is...