"There are known knowns; there are things that we know. We also know that 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."
US Defense Secretary Donald Rumsfeld
The purpose of this web site is to permit the reader to find as many of the unknowns as possible, without suffering severe brain damage.
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