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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]
Because of the strong relationship between polynomials and polynomial functions, the term "constant" is often used to denote the coefficients of a polynomial, which are constant functions of the indeterminates. Other specific names for variables are: An unknown is a variable in an equation which has to be solved for.
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. [ 20 ] Deterministic chaotic dynamics reproducing the Black Swan Event have been researched in economics. [ 21 ]
This is a list of placeholder names (words that can refer to things, persons, places, numbers and other concepts whose names are temporarily forgotten, irrelevant, unknown or being deliberately withheld in the context in which they are being discussed) in various languages.
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 ...
Imperative, [1] used after a term or phrase that should be looked up elsewhere in the current document or book. For more than one term or phrase, the plural qq.v. is used. re in re "in the matter of", "concerning" Often used to prefix the subject of traditional letters and memoranda.
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Medically unexplained physical symptoms (MUPS or MUS) are symptoms for which a treating physician or other healthcare providers have found no medical cause, or whose cause remains contested. [1] In its strictest sense, the term simply means that the cause for the symptoms is unknown or disputed—there is no scientific consensus.