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Science is unusual in
giving credit both
for advancing crazy new ideas, and for shooting down those kinds of
ideas. As
long as new ideas are well formulated, testable, and not yet ruled out,
they
are welcome. And any success in showing existing ideas to be wrong is
appreciated. In that sense, science is at the same time radically
progressive
and utterly conservative. I believe that it is a healthy balance
between those
two opposing tendencies that has allowed science to remain alive and
vigorous
for a dozen generations, an amazingly remarkable feat, for which I know
no
counterpart among human enterprises.
So science is driven by
a dynamic balance
between being playfully receptive to new ideas and at the same time
having a
strict and severe form of quality control. In this dynamic process,
everything
is up for grabs: tentative goals shift all the time, this trick is
tried and
that, and there is no fixed or holy procedure, a deviation from which
would be
forbidden or considered blasphemous. On the contrary, science is
intrinsically
opportunistic, and always ready to change its methods -- not
whimsically, but
only if there seems to be no alternative, when other options seem to
have been
exhausted.
We normally distinguish
between pure and
applied science. Applied science is driven by the desire to reach
specified
goals, whereas pure science in contrast is driven by curiosity, without
a
prescribed or expected goal. In terms of a dichotomy between methods
and goals,
or means and ends, pure science is guided by methods, rather than by
goals. But
stating it in that way is only an approximation. In fact, pure science
is more
pure than that: it is ready to sacrifice existing notions of methods as
readily
as preconceived goals, if a strong enough need is felt. A prime example
is
quantum mechanics, where even the existing notions of causality and
reproducibility were given up, at least as understood until then; they
were
replaced by considerably altered versions with the same name.
Scientists themselves
are probably equally
guilty at painting an overly simplistic and sanitized version of how
they carry
out their own research. The real dirty aspects of how science is
conducted amount
to something that is generally confined to the kitchen and not shown in
the
restaurant where science is served up for general consumption.
Yet another reason may
well be that science
had to defend its own reasons for existing, in its first few centuries,
until
it reached a brief hegemony in the middle of the twentieth century,
lasting a
few decades. During the earlier centuries, until 1950 or so, it would
not have
helped scientists if they would have loudly proclaimed to be engaged in
an
opportunistic enterprise in which everything was always up for grabs.
In fact,
it was through the eyes of sociologists of science that such an
impression was
first broadcast, in the late twentieth century, and to the dismay of
many
traditional scientists.
Piet, 5/30/06.