  An interesting form of token identity theory is the anomalous monism of Davidson 1980. Davidson argues that causal relations occur under the neural descriptions but not under the descriptions of psychological language. The latter descriptions use intentional predicates, but because of indeterminacy of translation and of interpretation, these predicates do not occur in law statements. It follows that mind-brain identities can occur only on the level of individual (token) events. It would be beyond the scope of the present essay to consider Davidson's ingenious approach, since it differs importantly from the more usual forms of identity theory.