  Now the second two principles seem to rule out the first. If causation requires strict laws, and there are no strict psychophysical laws, how can the mental be causally efficacious? But Davidson notes there is a way to save the first principle: as long as every mental event is physical, the first principle is compatible with the other two. In this way, the three principles entail event monism. At the same time, Davidson’s view entails type dualism, for the anomalism of the mental (the third principle) precludes identities between mental and physical types. Most philosophers find it natural to say that types are properties, so Davidson is sometimes described as a property dualist, a convenient label for the time being (but see §5.5).