More on Black and Grey Areas
Posted in Nature of Science, Philosophy, Random Stuff on June 23rd, 2006 by machtI recently wrote a post about black and grey areas of science, arguing that if the success of a theory is measured after the fact and not before it, then we cannot tell the difference between black areas of science and grey areas of science.
A similar argument that is often seen is that while there are no hard and fast rules that demarcate science from "pseudoscience," we can, never the less, tell the difference between the two in most instances. The analogy that is often used (and mentioned at the end of John Wilkins' post) is that while we can't precisely tell when day turns into night, we can confidently say that at 1:00 pm it is daytime. So, even though at 7:00 pm the sun may be down but light may still be visible, we can with all certainty say that at midnight it is pitch black.
In order for this analogy to work, ideas must be placed on a continuum - perhaps with well-established theories like quantum mechanics and general relativity positioned far to the left and pseudoscience and other forms of quackery, like Intelligent Design (creationism) and homeopathic medicine positioned at the far right. A whole host of other ideas will find themselves somewhere in between.  And while can't say precisely where on the continuum good science ends and bad science begins, we can be quite sure about the stuff found on either end.
This is a pretty plausible analogy. One thing it leads us to conclude, though, (which I mentioned in the previous post) is that, because this is a continuum, those ideas on the far right could shift their way over to the left if they are worked on and developed by some dedicated (tenacious) people. And, likewise, those ideas on the far left could move to the right if scientists no longer feel they are supported by the evidence or if scientists just don't find them useful any more. (Remember, the place on the continuum isn't supposed to be determined by the content of the theory, but by the method it's followers are using. This is another strange thing (according to conventional wisdom) about methodological naturalism, BTW - it's demarcation criterion is based on the content of the theory and not the way in which the theory was formed. But that's a topic for another post.) So that is one problem with the daytime-nighttime analogy - 2:00 am will still be nighttime and noon will still be daytime in 20 years, while theories may move around on our idea continuum.









