Yup, that is exactly that sort of "machine knowledge" that is beneficial.
I suspect where their algorithm isn't somewhat sure of the answer it essentially does A:B testing with users -- a while back I asked it who the governor of Illinois was and it replied Blagojevich (long after he was ousted). I pointed it out to a friend and they tried and got Quinn. In both cases it gives you the option of flagging whether it is wrong, though it seems suspect to let people who are asking the question in the first place declare its rightness, beyond egregiously wrong answers.
I suspect where their algorithm isn't somewhat sure of the answer it essentially does A:B testing with users -- a while back I asked it who the governor of Illinois was and it replied Blagojevich (long after he was ousted). I pointed it out to a friend and they tried and got Quinn. In both cases it gives you the option of flagging whether it is wrong, though it seems suspect to let people who are asking the question in the first place declare its rightness, beyond egregiously wrong answers.