Is refers to a theory emerged historically of the phrase in latin rare avis in terris nigroque simillima cygno (an ave rare in it land, similar to a Swan black) that speaks of the importance for the history of the humanity that have them events unexpected, ends and random, normally ignored by its low probability of give is. A Black Swan, is therefore something rare and unexpected, very rare but important.
Theory of events that the unexpected events of great magnitude in human history have a dominant impact on the expected but also are of great importance. Nassim Taleb, researcher and American economist, born in Lebanon in 1960 in the Black Swan discusses the impact of the highly improbable, also defending the idea that knowledge of the past does not allow us to predict the future. Examples of Black Swan events are internet or the destruction of the twin towers. Overstated them analysis rational of the causality, when the greater part of the times not is more than chance and also in economy. That the brainy financial note.
