Risks and Riddles
The Soviet Union was a puzzle. Al Qaeda is a mystery. Why we need to know the difference
- By Gregory F. Treverton
- Smithsonian magazine, June 2007, Subscribe
(Page 2 of 3)
Puzzle-solving is frustrated by a lack of information. Given Washington's need to find out how many warheads Moscow's missiles carried, the United States spent billions of dollars on satellites and other data-collection systems. But puzzles are relatively stable. If a critical piece is missing one day, it usually remains valuable the next.
By contrast, mysteries often grow out of too much information. Until the 9/11 hijackers actually boarded their airplanes, their plan was a mystery, the clues to which were buried in too much "noise"—too many threat scenarios. So warnings from FBI agents in Minneapolis and Phoenix went unexplored. The hijackers were able to hide in plain sight. After the attacks, they became a puzzle: it was easy to pick up their trail.
Solving puzzles is useful for detection. But framing mysteries is necessary for prevention.
That's one reason the FBI embarked on a change of mission after 9/11, from almost pure law enforcement to intelligence—from solving puzzles to framing mysteries. That change in mission requires an enormous change in organizational culture. For the puzzles of law enforcement, the measures of effectiveness are pretty clear—you can count the suspects collared and bad guys convicted. Terrorists, however, may commit but one crime, and by the time they do, it is too late. That scarcity of "collars" is a main reason why, rhetoric aside, counterterrorism was not a marquee FBI mission before 9/11.
For the mysteries of intelligence, measures of effectiveness are elusive. The goal of prevention is...nothing—an absence of attacks. But if no major terrorist attack occurs, does that represent the effectiveness of prevention, simple good luck or the fact that the threat was overstated in the first place?
That's one uncertainty we'll have to learn to live with. There are others that framing mysteries can help us understand.
No matter how much patients may seek the clarity of a puzzle, healthcare, too, is largely a mystery. The goal of medicine, like that of counterterrorism, is an absence—of illness and disease. Achieving that goal depends on many different factors. Behavior matters, but only in some complicated interaction with propensity; what is lethal obesity for one person is only a nuisance for another. Tests are imperfect predictors of illness, and treatments interact or have side effects.
While few doctors would put it this way, they act upon something that might be called Bayesian mystery framing. Bayes' theorem is a statistical technique for adjusting subjective probabilities in light of new, but inconclusive, evidence. Doctors base an initial assessment of a patient's health on propensity, as revealed by his or her medical history, and on diagnosis, determined through an examination. If the doctor's initial assessment is of a high probability of disease, he or she orders more tests, which in turn refine that probability. For chronic concerns, such as high blood pressure leading to heart disease, the initial assessment leads to a decision about whether and how to treat, followed by subsequent tests to see if the original probability of problems can be revised downward.
Single Page « Previous 1 2 3 Next »
Subscribe now for more of Smithsonian's coverage on history, science and nature.









Comments