 Anomalous Monism is a theory about the scientific status of psychology, the physical status of mental events, and the relation between these issues developed by Donald Davidson. It claims that psychology cannot be a science like basic physics, in that it cannot in principle yield exceptionless laws for predicting or explaining human thoughts and actions (mental anomalism). It also holds that thoughts and actions must be physical (monism, or token-identity). Thus, according to Anomalous Monism, psychology cannot be reduced to physics, but must nonetheless share a physical ontology.