 Lifestyles Unlimited. Text RADIO to 88007. I'm Jeff Davis with Just A Thought. At the World Summit on Evolution, they quoted former Defense Secretary Donald Rumsfeld, who said, "...there are known knowns, things we know that we know, and there are known unknowns, things that we know we don't know, but there are also unknown unknowns, things we do not know we don't know." Sounds like counting fingers to get to the thumb. But there's great truth in it.