OP-ED: Getting used to hacking

What about the ‘known unknowns not be known’?
Donald Rumsfeld passed away at the ripe age of 88 a few days ago. He took along with him narratives that will never be known, of his inside views of working in different capacities with four United States presidents. 

His book Known and Unknown elaborates his basic theories of the known knowns, the known unknowns, and the unknown unknowns. What he didn’t say was there are also known unknowns that are not be known. Profundity lurks in all of this apparent gibberish.