Saturday, March 12, 2011

Science Models Fail To Predict Japan’s Earthquake

If you think man has acquired enough expertise to know the environment, think again.

From the Washington Post, (bold highlights mine)

They have long been ready for the Big One in Japan. But when it arrived Friday, it was still surprising, still utterly devastating, and it left scientists around the world humbled at how unpredictable the heaving and lurching earth can be.

Japanese geologists have long forecast a huge earthquake along a major plate boundary southwest of Tokyo, and have poured enormous resources into monitoring the faint traces of strain building in that portion of the earth's crust. They have predicted in great detail the amount of property damage and the number of landslides such a tremor would generate. They have even given the conjectured event a name: The Tokai Earthquake.

Lesson: Despite the massive advances in technology, there is a limit to the knowledge man can acquire from the innate complexity of nature.

As aptly pointed out by Friedrich von Hayek in his Nobel Prize speech ‘The Pretence of Knowledge’… (bold emphasis mine)

The chief point we must remember is that the great and rapid advance of the physical sciences took place in fields where it proved that explanation and prediction could be based on laws which accounted for the observed phenomena as functions of comparatively few variables - either particular facts or relative frequencies of events. This may even be the ultimate reason why we single out these realms as "physical" in contrast to those more highly organized structures which I have here called essentially complex phenomena. There is no reason why the position must be the same in the latter as in the former fields. The difficulties which we encounter in the latter are not, as one might at first suspect, difficulties about formulating theories for the explanation of the observed events - although they cause also special difficulties about testing proposed explanations and therefore about eliminating bad theories. They are due to the chief problem which arises when we apply our theories to any particular situation in the real world. A theory of essentially complex phenomena must refer to a large number of particular facts; and to derive a prediction from it, or to test it, we have to ascertain all these particular facts. Once we succeeded in this there should be no particular difficulty about deriving testable predictions - with the help of modern computers it should be easy enough to insert these data into the appropriate blanks of the theoretical formulae and to derive a prediction. The real difficulty, to the solution of which science has little to contribute, and which is sometimes indeed insoluble, consists in the ascertainment of the particular facts.

And this applies to sociology too.

Bottom line: We should be leery of anyone who peddle to us the reliability of predictions based on science or math models, especially those who advance the policy of interventionism.

And this applies to whether we deal with the financial markets and the economy or with environmental issues such as global warming.

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