There are No Unknowns

I've begun using Microsoft's Lync at work recently. It's Monday, and my threshold for amusement has been significantly lowered, which might explain why I thought that this was funny:

It makes me think of the classic Donald Rumsfeld quote:

"Reports that say that something hasn't happened are always interesting to me because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns -- the ones we don't know we don't know." 

—United States Secretary of Defense, Donald Rumsfeld, Feb. 2002