Full Idea
Davidson's anomalous monism says that events are causes, so we can identify mental and physical events without having to identify their properties.
Clarification
'Anomalous monism' means 'one substance which is a misfit within natural laws'
Gist of Idea
Anomalous monism says causes are events, so the mental and physical are identical, without identical properties
Source
report of Donald Davidson (Mental Events [1970]) by Tim Crane - Elements of Mind 2.18
Book Reference
Crane,Tim: 'Elements of Mind' [OUP 2001], p.62
A Reaction
As Fodor insists, a thing like a mountain has properties at different levels of description. We can have 'property dualism' and full-blown reductive identity.