Under logical empiricism's influence, especially Carl Hempel's work on the "covering law" model of scientific explanation, most philosophers had viewed scientific explanation as stating regularities, but not identifying causes. To replace the covering law model's "inductive-statistical model" (IS model), Salmon introduced the "statistical-relevance model" (SR model), and proposed the requirement of "strict maximal specificity" to supplement the covering law model's other component, the "deductive-nomological model" (DN model). Yet ultimately, Salmon held statistical models to be but early stages, and lawlike regularities to be insufficient, in scientific explanation. Salmon proposed that scientific explanation's manner is actually "causal/mechanical explanation".