  Such a response seems to miss the point (Kim 1993b; McLaughlin 1993; Sosa 1993). All parties in this dispute agree that mental events can cause physical events. The difficulty is to understand how they could do so in virtue of their mental (rather than their physical) properties, how they could have physical effects qua mental. The principle of the Nomological Character of Causation (§5.1) apparently requires that, when one event causes another, it does so in solely virtue of its physical properties.