There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know.

I don't know what you were lookig for and I don't know I don't know. Try the archives. If you got here by clicking a link on this site that's incorrect, it would be swell if you could contact me!