 This second point does not appear to deliver the result Davidson is after—establishing that each causal interaction must be covered by a particular strict law. The claim that something is a change, and thus has a cause, only if certain theoretical assumptions are in place is consistent with the claim that those assumptions (for instance, that uniform rectilinear motion does not count as a change) cannot play the explanatory role for specific causal interactions that strict laws are supposed to play. They are simply of too general a nature—they don’t enable predictions or explanations of any particular events. And in any case, there appears to be nothing in Davidson’s considerations here that forces the requirement that the covering laws be strict as opposed to irreducibly ceteris paribus. (As we have already seen  (3.1),  Davidson himself has insisted upon the legitimacy and ubiquity of such laws in scientific explanation.)