seven852's definitions
These are things that you don't know that you don't know, as opposed to things that you know you don't know. Coined by Donlad Rumsfeld, former US Secretary of Defense.
Boss: Is there anything that will cause this system implementation to fail?
You: That's an unknown unknown!
You: That's an unknown unknown!
by seven852 September 20, 2009
Get the Unknown unknown mug.