The scenarios and forecasts built on this technical base were supplemented by the study of a few extreme hypothetical situations known as “wild cards” or “black swans” (major earthquake in Tokyo, terrorist attack in New York, asteroid strike in Western Europe) designed to stretch the borders of the crisis management maps and to stimulate our collective thought process—while remaining within the domain of the Possible.
Such techniques for describing the future and anticipating its opportunities and dangers have largely become obsolete because of the acceleration of technology itself and the increasing vulnerability of our society to chaotic processes that are not well behaved under most classic models.

At the Institute for the Future, a team headed up by Bob Johansen, Kathi Vian and myself has begun to develop a typology of Impossible Futures, starting from four classes of events:
A. Some futures are deemed impossible because they would require an extraordinary convergence of several scenarios, each of which has very low probability. The bankruptcy of General Motors (Fortune One!) in one week is a case in point.
B. Some futures are deemed impossible because they would require the convergence of several scenarios on time scales that violate our knowledge of reality. The failure of the Madoff funds, for example, was deemed impossible by his investors, all of whom were successful financial experts. It happened because two low-probability events converged: (1) regulatory authorities repeatedly refused to act every time the illegal scheme was brought to their attention, and (2) the subprime crisis dried up sources of funds overnight, exposing the fraudulent structure.
C. Some futures are deemed impossible because they would require the convergence of several scenarios, including forces or components that do not exist within accepted knowledge. In A.E.Van Vogt’s novel The World of null-A (for non-Aristotelian), a secret agent named Gosseyn is repeatedly assassinated. Each time, he is reincarnated in a new body held in reserve by his masters in special sarcophagi, endowed with increased abilities. A future when Gosseyn could exist lies outside the natural limits of our scientific knowledge and culture.
D. There are futures that are deemed impossible because we simply cannot imagine them. In Saddam Hussein’s culture there was no scenario in which U.S. forces could see the movement of his forces even at night, through clouds or through dust storms. Most nations still have no concept for devices that could detect underground cavities invisible from the air or from space. Even in modern American culture, the fact that remote classified facilities can be detected, visited, and accurately described by mental powers alone remains beyond accepted concepts.
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