Tuesday, August 22, 2017

Unknown Unknowns - Donald Rumsfeld testimony

“There are known knowns – 
these are things we know we know. 
There are known unknowns….
these are the things we know we do not know. 
But there are also unknown unknowns; 
these are the things we don't know we don't know.” 

Donald Rumsfeld
Former United States Secretary of Defense [1]

[1] Engineering: A Very Short Introduction. David Blockley. Oxford University Press. © 2012. Page 98. 

1 comment:

NaturalEcstatic said...

this is the best! we need to be comfortable working with the mystery