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A black swan (Cygnus atratus) in Australia. The black swan theory or theory of black swan events is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The term is based on a Latin expression which presumed that black swans did ...
A grey swan is an event that is known and possible to happen, but which is assumed to be unlikely to occur. [1] The term derives from black swan theory, which describes an event which is unlikely but unknown. [1] In electrical engineering, gray swan refers to the kind of events that rarely happens but have great impact on power systems. [2]
Elizabeth Taylor Greenfield (1817 – March 31, 1876), dubbed "The Black Swan" (a play on Jenny Lind's sobriquet, "The Swedish Nightingale" and Catherine Hayes's "The Irish Swan"), [1] [2] was an American singer considered the best-known Black concert artist of her time.
The book asserts that a "Black Swan" event depends on the observer: for example, what may be a Black Swan surprise for a turkey is not a Black Swan surprise for its butcher. Hence the objective should be to "avoid being the turkey", by identifying areas of vulnerability in order to "turn the Black Swans white".
For some positive films with white-colored fine structures in a dark background, their opaque areas may be removed or given a fuzzy edge. While chromogenic black-and-white films are supported by Digital ICE , other black-and-white films containing metallic silver , which form from silver halides during the development process of the film, are not.
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The black swan (Cygnus atratus) is a large waterbird, a species of swan which breeds mainly in the southeast and southwest regions of Australia. Within Australia, the black swan is nomadic, with erratic migration patterns dependent on climatic conditions. It is a large bird with black plumage and a red bill.
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