Rejecting Psychology - the reduction of all special sciences to Physics,

in Psychology there is the attempt to formulate strict deterministic laws linking mental states and events to other mental states in a psychological law way. For some there is an possibility of these psychological laws as well and for many there is  a rejection of the most basic goal of the science of psychology

For thee are  no precise laws that relate mental states and events to other mental states and events.  

 This is so because, when we state which action someone is performing versus merely describing the physical movement his body is undergoing, we are contributing an interpretation of him and interpretation, as we have seen, is guided by certain normative constraints. Thus, the laws that could relate an agent’s mental states to his actions would count as psychological laws.

The gist of the argument against psychological laws can be found in the following passage:n our example, the reason for one to turn on the television, let’s say, is that one is lonely and desires company. Thus, one reason (namely, to keep one company) was the cause of the action while the other reason (namely, to watch one’s favorite show) was not. Davidson continues:

Of course, we can include this idea too in justification; but then the notion of justification becomes as dark as the notion of reason.