Socrates-I am the wisest man in the world because i know one thing. That i know nothing?

Socrates claimed this after finding out from the oracle that there was no-one wiser than he. Does this mean that he is wisest because some think they know truth about beauty etc but he could always disprove them but never claimed to know the truth of what, in this example, beauty was. Could someone explain with a simple ogy what he means and tell me if Socrates' characteristic questioning to disprove others worked, or would work, against 'scientific facts'?