implications of being an art
Implications of an art form
If astrology is entirely an art as defined above, and entirely not a science, then the scientific approach must by definition be rejected. Of course many astrologers already do this. But they do not observe the consequences, which means not making testable statements and not making claims like "Jupiter indicates expansiveness."
Note the problem: Without a sound scientific basis, which astrology is now by definition incapable of having, nobody can legitimately claim that Jupiter indicates anything. All that could be said is something like "the ancient Greeks thought that Jupiter indicates expansiveness, but nobody knows if this is actually true." Anything else would turn astrology into a pseudoscience -- an art form falsely posing as a science, as when the testing of testable claims is rejected or ignored
Science
Campion considers three ways of defining science, namely in terms of (1) its results, (2) its tools, and (3) what scientists do. But these three ways are equally applicable to say gardening or car repairs or even astrology, which thus becomes defined as its results, its tools, or what astrologers do. None of them taps the essential nature of science and its underlying aim, which is obtaining knowledge by systematic testing.
This knowledge is not any old knowledge but a sweeping system of interlinked knowledge that is consistent from one end to the other. For example it would be unacceptable if our knowledge of how atoms behave in chemistry was inconsistent with how they behave in physics.
As more and more knowledge is incorporated into the system, doubtful inconsistencies may be rightly ignored because science is too soundly based to justify chasing anything entirely speculative. But if the inconsistencies are themselves soundly based, as they were for the perihelion advance of Mercury, then in due course science shifts to accommodate them, in this case from Newton to Einstein.
Limitations of Science
Astrologers often point to what they see as the limitations of science that stop it detecting astrological effects. They claim that science is impersonal or unspiritual or insensitive to deeper truths. Or they claim that astrology involves subtle factors not yet known to science. But science requires only that events be observable in some way. And if astrologers can observe the claimed effects, so can scientists.
So the limitations are straightforward -- if no possible observation could rule out a particular claim, the claim is untestable and science is irrelevant. As is the claim in the first place -- if nothing can show it is wrong, then by the same token nothing can show it is right.
Science of course is subject to greed, jealousy and politics like any other human activity. But the over-riding insistence that issues be decided by careful testing means that scientific knowledge is ultimately self-correcting. It may take years or decades, but ultimately errors in science do not survive. How does astrology compare?
Astrology
Campion considers four ways of defining astrology, namely as (1) a science that seeks empirical answers to questions, (2) a neo science that seeks empirical validation of its ideas, (3) a pseudo science that does false science, and (4) a humanity that interprets data. Note how these four are not the same as the previous three (astrology = its results, its tools, or what astrologers do).
Campion himself prefers (4). And its merits are obvious -- by confining itself to interpretation, astrology is elevated above any criticism based on grubby empiricism. (I come back to this point later). But rather than trying to define science and astrology in absolute terms, it seems better to consider what distinguishes one from the other
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