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Quinn, H. (2009). What is science ? Physics Today, 8–9.  
Added by: Dominique Meeùs 2010-11-06 08:22:05 Pop. 0%
      Much of science seeks to explain observations of the current state of the natural world by developing an evidence-based history of how that situation arose, much as a detective reconstructs a crime. Computer programs that can simulate the progression of the system—or some aspects of it—over time are important tools in such science and can be powerful means to predict outcomes. The developed history must be consistent not only with all that is known about the system in question but also with all that is understood about processes that occur within the system. Geoscience, climate science, astrophysics, cosmology, and evolutionary biology all use that important history-building approach to develop major parts of their theories.
      Theories and models develop over time. Based on data, they undergo a long-term process of testing and refinement before becoming accepted scientific explanations or tools in a given domain. […]
     Scientific theories, even when generally accepted after much testing and refinement, are still never complete. Each can be safely applied in some limited domain, some range of situations or conditions for which it has been well tested. Each might also apply in some extended regime where it has yet to be tested, and may have little or nothing to offer in still more distant domains. That is the sense in which no theory can be proven to be true; truth is too complete a notion. We need to emphasize that the incompleteness of theory in no way compromises the stability over time of well-established understanding in science—an important notion that is seldom made explicit.
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