From this step, Kant concludes that a moral proposition that is true must be one that is not tied to any particular conditions, including the identity of the person making the moral deliberation. A moral maxim must imply absolute necessity, which is to say that it must be disconnected from the particular physical details surrounding the proposition, and could be applied to any rational being. This leads to the first formulation of the categorical imperative, sometimes called the "universalizability principle":[2]
"Act only according to that maxim whereby you can at the same time will that it should become a universal law without contradiction."[1]
Kant divides the duties imposed by this formulation into two subsets: