  and they appeal to the Davidson-Anscombe thesis to argue that the act of moving the arm = the act of trying to move the arm. On this view, the act of trying — which is the act of moving — causes a movement of the arm in much the same way that an act of moving the arm causes the onset of illumination in the light. Both the onset of illumination and the overt arm movement are simply causal consequences of the act itself, the act of trying to move his arm in just this way. Further, in light of the apparent immediacy and strong first person authority of agents' judgements that they have tried to do a certain thing, it appears that acts of trying are intrinsically mental acts. So, a distinctive type of mental act stands as the causal source of the bodily behavior that validates various physical re-descriptions of the act.