The term Black Swan comes from the 17th century European assumption that 'All swans are white'. In that context, a black swan was a symbol for something that was impossible or could not exist. The Black Swan Theory (according to Nassim Nicholas Taleb) refers to high-impact, hard-to-predict, and rare events beyond the realm of normal expectations.
Taleb's purpose in the book is to build robustness to the negative Black Swan events while exploiting the positive ones.
Satellite navigation works best with 24 functioning orbiters. If
several were to switch off, thousands of adventurers could go off
How respond to these and other inevitable black swans makes all the difference in the world.