There are known knowns
"There are known knowns" is a phrase from a response United States Secretary of Defense Donald Rumsfeld gave to a question at a U.S. Department of Defense news briefing in February 2002 about the lack of evidence linking the government of Iraq with the supply of weapons of mass destruction to terrorist groups.
Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns -- the ones we don't know we don't know. And if one looks throughout the history of our country and other free countries, it is the latter category that tend to be the difficult ones.
The statement became the subject of much commentary.
As for the substance of his statement, Rumsfeld's defenders have included Canadian columnist Mark Steyn, who called it "in fact a brilliant distillation of quite a complex matter", and Australian economist and blogger John Quiggin, who wrote, "Although the language may be tortured, the basic point is both valid and important ... Having defended Rumsfeld, I'd point out that the considerations he refers to provide the case for being very cautious in going to war."
Psychoanalytic philosopher Slavoj Žižek says that beyond these three categories there is a fourth, the unknown known, that which we intentionally refuse to acknowledge that we know: "If Rumsfeld thinks that the main dangers in the confrontation with Iraq were the "unknown unknowns", that is, the threats from Saddam whose nature we cannot even suspect, then the Abu Ghraib scandal shows that the main dangers lie in the "unknown knowns" – the disavowed beliefs, suppositions and obscene practices we pretend not to know about, even though they form the background of our public values."
German sociologists Daase and Kessler (2007) agree with a basic point of Rumsfeld in stating that the cognitive frame for political practice may be determined by the relationship between what we know, what we do not know, what we cannot know, but Rumsfeld having left out what we do not like to know.
Taleb had dealt predemonantly with financial events but had already introduced the Black Swan concept, which was elaborated in his 2007 book The Black Swan: The Impact of the Highly Improbable. The core message of The Black Swan is that unknown unknowns are responsible for the greatest societal change.
Rumsfeld named his autobiography Known and Unknown: A Memoir.
- Epistemic modal logic
- Dunning–Kruger effect
- I know that I know nothing
- Ignoramus et ignorabimus
- Ignotum per ignotius
- Johari window
- List of political catch phrases
- Ludic fallacy
- Outside Context Problem
- Relevance paradox
- "Defense.gov News Transcript: DoD News Briefing – Secretary Rumsfeld and Gen. Myers, United States Department of Defense (defense.gov)".
- Girard, John; Girard, JoAnn (2009-06-01). A Leader's Guide to Knowledge Management: Drawing on the Past to Enhance Future Performance. Business Expert Press. pp. 55–. ISBN 9781606490198. Retrieved 10 February 2014.
- "Rum remark wins Rumsfeld an award". BBC News. 2 December 2003. Retrieved March 31, 2013.
- Pullum, Geoffrey K. (2003-12-02). "Language Log: No foot in mouth". Penn: University of Pennsylvania. Retrieved 2012-04-12.
- Steyn, Mark (December 9, 2003). "Rummy speaks the truth, not gobbledygook". Daily Telegraph. Retrieved 2008-10-30.
- Quiggin, John (February 10, 2004). "In Defense of Rumsfeld".
- "What Rumsfeld Doesn't Know That He Knows About Abu Ghraib". Retrieved 2009-02-23.
- Knowns and Unknowns in the `War on Terror': Uncertainty and the Political Construction of Danger, Christopher Daase and Oliver Kessler, Security Dialogue, December 2007; vol. 38, 4: pp. 411-434.
- DoD News Briefing - Secretary Rumsfeld and Gen. Myer, February 12, 2002 11:30 AM EDT
- Days that shook the world, Oliver Burkeman, book review in The Guardian 2007
- A Point of View: See no evil 10 January 2014
- Kursbuch 180: Nicht wissen (not knowing (sic!)), Armin Nassehi, Peter Felixberger Murmann Verlag DE, 02.12.2014
- Neve, Geert de; Luetchford, Peter (2008). Hidden Hands in the Market: Ethnographies of Fair Trade, Ethical Consumption, and Corporate Social Responsibility. Emerald Group Publishing. pp. 252–. ISBN 9781848550582. Retrieved 10 February 2014.
- Scott (2014). "Not Giving an Inch in a Battle of Wits and Words; Deciphering Donald H. Rumsfeld in ‘The Unknown Known’". Retrieved 4 April 2014.
- February 12, 2002, Press conference – The reporter asks the question that leads to the "known unknowns" response at approx. 37:19