Saturday, February 5, 2011

Known or Unknown #youprefer

Donald Rumsfield once said:
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.
For some stupid reason, I thought this was very smart and had quoted this in a letter to someone, trying to be a smart alec. That person obviously did not find it very funny.
Reading The Black Swan this week, sort of triggered a flashback about this quote, so sharing this again. Enjoy.


  1. There is an investment philosophy based on the Unknown and Unknowable by Richard Zeckhauser of Harvard. Here it is


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