Quote:
Originally Posted by sycamore
Flint, your post reminded me of this fine piece of work from Donald Rumsfeld:
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.

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That quote has been utilized at many scientific conferences; The Skeptic in Scientific American did a piece on it.