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Popular discussion of unknowability grew with the use of the phrase There are unknown unknowns by United States Secretary of Defense Donald Rumsfeld at a news briefing on February 12, 2002. In addition to unknown unknowns there are known unknowns and unknown knowns. These category labels appeared in discussion of identification of chemical ...
Rumsfeld during a Pentagon news briefing in February 2002 "There are unknown unknowns" is a phrase from a response United States Secretary of Defense Donald Rumsfeld gave to a question at a U.S. Department of Defense (DoD) news briefing on February 12, 2002, about the lack of evidence linking the government of Iraq with the supply of weapons of mass destruction to terrorist groups. [1]
Uncertainty or incertitude refers to situations involving imperfect or unknown information. It applies to predictions of future events, to physical measurements that are already made, or to the unknown. Uncertainty arises in partially observable or stochastic environments, as well as due to ignorance, indolence, or both. [1]
In a few days’ time, investors went from breathing a sigh of relief that the Federal Reserve had cut rates to holding their breath because of the rapid re-escalation of trade fears and slowing ...
A fixed model considers the "known unknowns", but ignores the "unknown unknowns", made famous by a statement of Donald Rumsfeld. [19] The term "unknown unknowns" appeared in a 1982 New Yorker article on the aerospace industry, which cites the example of metal fatigue , the cause of crashes in Comet airliners in the 1950s.
An idiopathic disease is any disease with an unknown cause or mechanism of apparent spontaneous origin. [1]For some medical conditions, one or more causes are somewhat understood, but in a certain percentage of people with the condition, the cause may not be readily apparent or characterized.
The Unknown Known (also known as The Unknown Known: The Life and Times of Donald Rumsfeld) is a 2013 American documentary film about the political career of former U.S. Secretary of Defense and congressman Donald Rumsfeld, directed by Academy Award winning documentarian and filmmaker Errol Morris.
There is a particular scene in too many Hollywood biopics that goes like this: While the brilliant-but-prickly hero is splashing paint on a canvas or solving an unsolvable math equation or writing ...