There are no strict psychological laws and co-ordinate conditions that ensure a suitable action will be the invariant product of pertinent pro-attitudes, beliefs, and other psychological states.
One of the principal arguments that was used to show that reason explanations of action could not be causal was the following. If the agent's explaining reasons R were among the causes of his action A, then there must be some universal causal law which nomologically links the psychological factors in R (together with other relevant conditions) to the A-type action that they rationalize. However, it was argued, there simply are no such psychological laws; there are no strict laws and co-ordinate