Friday, February 28, 2014
Thursday, February 27, 2014
Blind commitment to a theory is not an intellectual virtue; it is an intellectual crime
Reprinted from Environmental Science and Policy, Vol.3(1), 2000, 19-20.
Copyright 2000, with permission from Elsevier Science.
http://www.elsevier.com/locate/envsci/
http://www.sciencedirect.com
IN SUPPORT OF SKEPTICISM
"Most institutions demand unqualified faith;
but the institution of science makes skepticism a virtue."
(Merton, 1962)
Most scientists acknowledge the importance of making science relevant and useful in policy making, while recognizing that policy is not, and should not be, based on science alone.
In recent decades, investigations of major environmental issues such as climate change, acid rain, smog, and hypoxia have resulted in the conduct of complex integrated assessments. Such assessments organize information for the purpose of improving the effectiveness of policy making.
In policy making, especially in a political arena, consensus building is a key ingredient. In attempts to make science relevant and useful, the politics of democracy tend to promote, even in some cases demand "scientific consensus." However, as a "community of belief" develops, skepticism is no longer regarded as a virtue. In a civilization that is founded on science, this is an unfortunate state of affairs and detrimental to our future.
In order to appreciate this concern, it is necessary to revisit the central role of skepticism in science. Let us start with a dictionary definition of skepticism. Webster's Dictionary defines skepticism as: "A critical attitude towards any theory, statement, experiment, or phenomenon, doubting the certainty of all things until adequate proof has been produced; the scientific spirit." The Greek root of skepticism is identified as "skepticos", which means "thoughtful, inquiring."
For centuries, science has been founded on well-established methods of scientific investigation, which include recognition that "A scientific theory must be tentative and always subject to revision or abandonment in light of facts that are inconsistent with, or falsify, the theory. A theory that is by its own terms dogmatic, absolutist and never subject to revision is not a scientific theory" (Judge William R. Overton, in Science, 1982). Thus, a basic tenet of science is for scientists to posit and test hypotheses and theories. Scientific progress is made by accepting or rejecting hypotheses at specified levels of confidence, thus embodying skepticism in the heart of scientific methodology.
There are two dominant and somewhat opposing philosophies on testing hypothesis and theories. One philosophy is that the purpose of hypothesis testing is to validate - to support or corroborate - a hypothesis. The other philosophy is that the purpose of hypothesis testing is to attempt to invalidate a hypothesis. And the same applies to model testing; there are scientists who attempt only to validate models, and others who state that the true application of the scientific method includes attempts to invalidate models and to show the limits of applicability of models. In science, attempts to invalidate hypotheses and models - hard-core skepticism, by any definition - should be viewed as a necessary positive step in the pursuit of truth. Rigorous hypotheses and models will emerge as triumphant - at least for the time being. In a problem-solving and policy-development mode, healthy skepticism is needed to ensure the rigor and effectiveness of proposed solutions. Another way of expressing the difference between these two philosophies is to state that "Blind commitment to a theory is not an intellectual virtue; it is an intellectual crime" (Lakatos, 1978).
This is why I regard consensus science and the demise of scientific skepticism as an unhealthy combination. Without the boldness and perseverance of earlier skeptics, who risked ridicule and being branded as heretics, we would still believe Earth to be the center of the Universe and continents to be motionless.
Taking the issue of climate change as an example, there are healthy signs of increasing recognition of the importance of dealing with important methodological uncertainties. Petersen (1999), in an inspiring article entitled "Philosophy of Climate Science", states that, "Climate science has to deal with important methodological problems concerning climate simulation. Among these are methodological problems related to climate model hierarchy and complexity, tuning and falsifiability, and uncertainty. All these subjects have only recently become topics of discussion within the climate science community." He finds that uncertainties are currently not thoroughly and methodologically assessed for the purposes of policy usefulness of climate science. Barnett et al. (1999), in a scholarly article summarizing the status of detection and attribution of an anthropogenic climate signal, also find that "Only recently has detection work paid serious attention to the variety of uncertainties that attend the observations and model projections of an anthropogenic signal."
We must find improved ways of preserving and strengthening the time-honored method of scientific investigation, which includes promoting skepticism in
How girl ELEVEN grabbed gun and shot dead cougar that was stalking her brother, 13, outside their house
- Shelby White, 11, killed her first cougar on her grandfather's ranch in Twisp, Washington, last week
- Female cougar had been spotted near family's home twice in the days prior to the shooting
- Shelby's 9-year-old brother, Cody, shot a 125-pound cougar earlier this month
- Tanner White, 13, Shelby and Cody's oldest brother, killed a big cat near the ranch around same time
- Shelby has been hunting since she was 8 or 9, and so far she has bagged herself three deer
- State officials and hunters killed 10 other cougars during the winter season
When Thomas White spotted a cougar approaching his teenage son outside their home in rural Washington state last week, there was only one thing to do - hand a gun to his 11-year-old daughter.
Without a moment's hesitation, Shelby White killed the female cougar, and wildlife officials suggested that the animal may have been sick.
The mountain cat was 4 years old and weighed about 50lbs, which is about half of what an animal that age should weigh.
My, what big teeth you have! Shelby is showing off the teeth of the predator that was stalking her 13-year-old brother
Family hobby: Shelby (left) has been hunting with her trusty .234 caliber gun since age 8 or 9, and her younger brother Cody (right) is also an enthusiast of the sport
'This cougar was very, very skinny,' State Fish and Wildlife Officer Cal Treser said.
The fearless 11-year-old took action when she saw the cougar following her 13-year-old brother as he was walking towards their home in the town of Twisp, population 940.
In a phone interview with MailOnline Wednesday night, Shelby’s grandfather, William White, revealed that it was a fourth cougar killed on his property in the past several weeks.
Mr White, 64, a cattle rancher, said that earlier this month, Shelby’s 13-year-old brother, Tanner, also shot a cougar that has been circling his farm.
‘We're real avid hunters,’ Mr White said of his clan, which he described as 'backwoodsy.' .
The rancher explained that until recently,
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