Since Nassim Nicholas Taleb published his bestseller The Black Swan: the impact of the highly improbable back in 2007, “Black Swans” and “Black Swans events” have become part of everyday language.
They are used as a catchphrase to mean two different things. First, as was the case in the Brookings interesting interactive "briefing book" Big Bets and Black Swans: Foreign Policy Challenges for President Obama’s Second Term, "black swans" represent high impact, low probability events, what is also known as wild cards.[i]
Second, "black swans" refer to events that could absolutely not be predicted, as, for example for the Economist in ”The prediction games: Our winners and losers from last year’s edition”. Unfortunately, in this case, the label “black swans” excuses foresight errors. It tends to stop explanations and evaluation. Similarly, some will make statements along the line of “oh, but there is no point to do any foresight (or futures work or forecast), did you not read Taleb’s Black Swan? One cannot predict or foresee anything.”
This is a rather bold statement, especially when one seeks to anticipate uncertainty and to foresee and warn. We thus need to explore the unpredictability claim further.