A good poem I found today. It's telling you how you know about what you know.

The tittle is "The Unknown" by Donald Rumsfeld. Feb 2002, Department of Defense news briefing.

The Unknown

As we know,
There are known knowns.
There are things we know we know

We also know,
There are known unknowns.
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.

Such a great poem. Simple, but covers everything about the nature of human and information literacy.