or·ga·non /ˈɔrgəˌnɑn/
  推理法,工具論
  Or·ga·non Or·ga·num n.  An organ or instrument; hence, a method by which philosophical or scientific investigation may be conducted; -- a term adopted from the Aristotelian writers by Lord Bacon, as the title (“Novum Organon”) of part of his treatise on philosophical method.
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  organon
       n : a system of principles for philosophic or scientific
           investigations; an instrument for acquiring knowledge
       [also: organa (pl)]