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Wiktionary英語版での「Unknown Unknown」の意味 |
unknown unknown
語源
Popularized by Donald Rumsfeld in 2002, though used much earlier.
名詞
unknown unknown (複数形 unknown unknowns)
- An uncertainty of unknown magnitude, consequence, structure, and probability characteristics, possibly with completely unsuspected existence; something that we don't know that we don't know.
- 1970, United States Congress. Senate. Committee on the Judiciary. Subcommittee on Antitrust and Monopoly, Competition in Defense Procurement – 1969: Hearing, Ninety-first Congress, page 166:
- 2002 February 12, Donald Rumsfeld, “Defense.gov News Transcript: DoD News Briefing – Secretary Rumsfeld and Gen. Myers, United States Department of Defense (defense.gov)”, in Defense.gov Transcript Archive[1], archived from the original on 2016-08-10:
- 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.
- 2014 January 29, Kenneth Chang, “Beings not made for space: After years of missions, health problems of astronauts elude doctors”, in International New York Times[2], page 7:
- NASA officials often talk about the "unknown unknowns" – the unforeseen problems that catch them by surprise.
「Unknown Unknown」の部分一致の例文検索結果
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unknown preference- unknown発音を聞く 例文帳に追加
unknown preference- 不明 - PEAR
unknown replacement- unknown発音を聞く 例文帳に追加
unknown replacement- 不明 - PEAR
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意味 | 例文 (999件) |
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Text is available under Creative Commons Attribution-ShareAlike (CC-BY-SA) and/or GNU Free Documentation License (GFDL). Weblio英和・和英辞典に掲載されている「Wiktionary英語版」の記事は、Wiktionaryのunknown unknown (改訂履歴)の記事を複製、再配布したものにあたり、Creative Commons Attribution-ShareAlike (CC-BY-SA)もしくはGNU Free Documentation Licenseというライセンスの下で提供されています。 |
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