 By 1970, Salmon had found that when seeking to explain probabilistic phenomena, we seek not merely high probability, but screen for causal influence by removing components of a system to find ones that alter the probability.Salmon sought to replace Hempel's IS model with Salmon's statistical-relevance model (SR model).In 1948 when explicating DN model, Carl Hempel and Paul Oppenheim had stated scientific explanation's semiformal "conditions of adequacy" (CA), but acknowledged redundancy of the third, "empirical content" (CA3), implied by the other three