It Makes a Difference to the Sheep

The Unknown

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.

--Feb. 12, 2002, Department of Defense news briefing

// posted by Kirk @ 2:35 PM