positivist
  實證哲學家,實證主義者
  Pos·i·tiv·ist, n. A believer in positivism. -- a. Relating to positivism.
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  positivist
       adj : of or relating to positivism; "positivist thinkers";
             "positivist doctrine"; "positive philosophy" [syn: positivistic,
              positive]
       n : someone who emphasizes observable facts and excludes
           metaphysical speculation about origins or ultimate causes
           [syn: rationalist]