Find Out What You Need to Know, And How You Can Know It
True story: I thought about opening this segment with the Donald Rumsfeld "there are the known knowns" quote. It didn't take long to find that he wasn't the first person to say that: here's Ibn Yamin, taken from the Wikipedia entry for the Rumsfeld speech—http://en.wikipedia.org/wiki/There_are_known_knowns:
One who knows and knows that he knows... His horse of wisdom will reach the skies.
One who knows, but doesn't know that he knows... He is fast asleep, so you should wake him up!
One who doesn't know, but knows that he doesn't know... His limping mule will eventually get him home.
One who doesn't know and doesn't know that he doesn't know... He will be eternally lost in his hopeless oblivion!
The thing is that, had I not looked this up, I could've confidently attributed that idea to Rumsfeld. "Aha," thinks I, "I've shown an example of thinking I know...