  Still, it is quite possible that Reid is right. The question turns on whether or not it is possible to provide an adequate picture of the psychology of deliberation without appeal to the belief that we are endowed with power. What the first argument from moral liberty serves to do is not to silence the opposition, but instead to force the opposition not to oversimplify the phenomena. Those who deny that human beings are endowed with power in Reid's sense need to explain what we are thinking when we deliberate. That explanation must not gloss over the complexity of ordinary deliberation, but also must not show us to be thinking ourselves to be endowed with power in Reid's sense whenever we deliberate about what to do (see Yaffe 2004, ch. 1).