STRUCTURAL EQUATIONS AND BEYOND
- Citation data:
The Review of Symbolic Logic, ISSN: 1755-0203, Vol: 6, Issue: 04, Page: 709-732
- Publication Year:
- Mathematics; Arts and Humanities
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Recent accounts of actual causation are stated in terms of extended causal models. These extended causal models contain two elements representing two seemingly distinct modalities. The first element are structural equations which represent the (causal) laws or mechanisms of the model, just as ordinary causal models do. The second element are ranking functions which represent normality or typicality. The aim of this paper is to show that these two modalities can be unified. I do so by formulating two constraints under which extended causal models with their two modalities can be subsumed under so called counterfactual models which contain just one modality. These two constraints will be formally precise versions of Lewis' (1979) familiar system of weights or priorities governing overall similarity between possible worlds. Copyright © 2013 Association for Symbolic Logic.