Published online by Cambridge University Press: 01 April 2022
This essay defends two theses that jointly establish a link between causal and explanatory asymmetry. The first thesis is that statements specifying facts about effects, unlike statements specifying facts about causes, are not “independently variable”. The second thesis is that independent variability among purportedly explanatory factors is a necessary condition on scientific explanations.
I have been working on the ideas in this essay for over a decade and have received a great deal of help from colleagues, students and members of a number of audiences. I have particularly benefited from conversations with Clark Glymour, Alexander Rosenberg, Herbert Simon, and James Woodward. My work was funded by the National Endowment for the Humanities during the summer of 1986 and by the Wisconsin Alumni Research Foundation during the spring of 1991. Anonymous referees have also provided useful criticisms.