Aquamarine
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Of course science is more than a collection of facts.ZapperZ said:Again, you don't seem to understand the difference between "selecting the appropriate model for set of data" and "selecting a theory to be correct". I asked you if you think physics is nothing more than just a collection of data. You never answered. If you think it is, then it would be consistent to your persistent of "curve fitting" analogy. But it would also clearly reveal your faulty knowledge of what physics is. Maybe this is why you refused to answer.
Secondly, Foster is EXACTLY describing what I just mentioned, especially in quantitative analysis of data! (Note: I graduated from UW-Madison also where Foster is a faculty member). Not only that, *I* have done the very same thing in my analysis of my experimental data. This means that I just don't pay lip service about these things, I have DONE it. However, these things are done simply to create a phenomenological model that can be checked, tested, and eventually evolved into a theory that is derived from First Principles. It is NEVER done to SELECT which theory is "correct"! This is what I've been trying to get across!
Look, if I were to give you tons and tons of links to read about high-Tc superconductors (and trust me, I am able to do that), I bet you'll roll your eyes and let a few things fly over your head. I'm not asking for links. I am asking you to PICK ONE physics example (I don't care where you hijack that example from) and tell me clearly how Occam's Razor was applied in picking out which theory is correct. Pick one from within this past century, if you please, since you obviously do not care for the example I picked already.
Zz.
Please give an exact quote from Foster that support your statement.
Regarding examples, exactly the same arguements that were used in the Ptolemaic example can be used in any scientific controvery this century. Take the probably most famous of them, Einstein against Newton.
Or from one of the lnks that you have not read:
http://www.abc.net.au/rn/science/ockham/stories/s118778.htmOckham’s Razor is also the motivation behind unification of physical theory. A good example of this came nearly 100 years ago. The German physicist Max Planck had invented an early version of the quantum theory that explained a baffling phenomenon: the speed of electrons that were thrown off when light is shone at a metal. His equations called for a new physical constant, a new constant of nature, whose value had to be found from the observations he made. But the same idea was then applied to explain the amount of radiation given off by a hot body, an electric fire, for example, and also to explain the wavelengths of light that are absorbed by hydrogen atoms. But of these further phenomena had been experimentally studied and each had required its own physical constant of nature to be set separately from the observations. The new idea related these two extra constants to Planck’s and accurately gave their values. Three supposedly separate phenomena had been shown to have the same underlying explanation. The quantum idea was rapidly accepted in consequence.
My last example is from cosmology. When Einstein worked out his general theory of relativity and gravity early in the 20th century, and improved on Newton’s venerable theory, there was room for an arbitrary constant, known as a parameter, in his equations. To keep things simple he was tempted to put it to zero, but another consideration weighed even more heavily: he believed on philosophical grounds that the universe was unchanging on the large scale. He believed it was unchanging in how the great clusters of stars, called galaxies, relate to each other. This meant that his number could not be zero, for technical reasons.
But some years later, it was found that the galaxies were in fact all rushing away from one another. In Einstein’s mind, an informal version of the Ockham analysis immediately took place and he reverted to the value zero for his number, which is called the ‘cosmological constant’ today. In this spirit, a translation of the Latin Ockham’s Razor, ‘entia non sunt multiplicanda praeter necessitatem’ would be ‘Parameters should not proliferate unnecessarily’. This particular plot has thickened though: the value of Einstein’s cosmological constant is once again in question. Is it zero, or is it very small, and should be chosen so as to best fit the data?
We don’t know yet. This is why these questions are exciting.
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