 According to advocates of the System of Necessity, there is a sense in which the performance of this action is up to you. No one forced you to get up out of bed. There is also a sense in which you did it because you believed you should. It is this belief, coupled with a desire—perhaps to do what is right—that moved you to get out of bed. Finally, there is a sense in which there is an explanation of your action that is perfectly law-like. Because your desire (let us suppose) to do what is right was stronger than your desire to stay in bed, it won out. Under the supposition that stronger motivations win, we have a perfectly general, law-like explanation of why you acted as you did.