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 3 Carl Hempel, "Two Models of Scientific Explanation" Carl Gustav Hempel 's (1905- 1997) classic account of explanation is widely known as the "covering-law model. " It includ es two species : the Deductive-Nomological Explanation and the Probabilistic-Statistical Expla- nation . Since its introduction in the semi nal pape r co-autho red by Hempel and Paul Oppenheim (1948), the model has been intensely debated and criticized in the philosophy of scien ce literat ure. For although certain experiments are always necessary to serve as a basis for reasoning, nevertheless, once these experiments are given, we should derive from them everything which anyone at all could possibly derive; and we should even discover what experiments remain to be done for the clarification of all further doubts. That would be an admirable help, even in political science and medicine, to steady and perfect reasoning concerning given symp- toms and circumstances. For even while there w...