Abstract

Rani Lill Anjum and Stephen Mumford have recently defended a new kind of modality, which they call ‘dispositional modality’. The key reason to adopt dispositional modality, according to them, is that causes never necessitate their effects. Anjum and Mumford’s chief argument against causal necessitation makes use of what they call the ‘antecedent-strengthening test’ : C causally necessitates E iff C & φ causes E, for any possible φ. This test, they claim, fails in all cases of alleged causal necessitation. In this paper we argue that the AS-test is not the mark of causal necessitation. First, we show that if the AS-test is taken as the mark of causal necessitation it leads to either an absurdity or to circularity. Second, we argue that, given the Mill/Mackie framework of causes as INUS conditions, apparent counterexamples to causal necessitation fail.