Which one of these is not a principle that can be drawn from the Categorical Imperative?

Act as if the maxim of your action were to become by your will a universal law.
Act that you use humanity, whether in your own person or in the person of another, always at the same time as an end, never merely as a means.
Act so that the maxim of your action ensures the satisfaction of your desires.
Act only so that your will could regard itself as at giving universal law through all its maxims.

The principle that is not drawn from the Categorical Imperative is: "Act so that the maxim of your action ensures the satisfaction of your desires."

To determine this, we need to understand the Categorical Imperative, which is a moral principle developed by Immanuel Kant. Kant believed that morality should be based on reason alone, rather than on subjective desires or consequences. According to the Categorical Imperative, an action is morally right if it can be willed as a universal law.

Let's break down the given principles to identify which one does not align with the Categorical Imperative:

1. "Act as if the maxim of your action were to become by your will a universal law." This principle aligns with the Categorical Imperative since it suggests that our actions should be based on whether we can will them to be universal laws.

2. "Act that you use humanity, whether in your own person or in the person of another, always at the same time as an end, never merely as a means." This principle also aligns with the Categorical Imperative since it emphasizes treating humanity as an end in itself, rather than as a mere tool.

3. "Act so that the maxim of your action ensures the satisfaction of your desires." This principle does not align with the Categorical Imperative. While desires can influence our actions, the Categorical Imperative focuses on universal moral principles and reasoning rather than personal desires or satisfaction.

4. "Act only so that your will could regard itself as giving universal law through all its maxims." This principle is in line with the Categorical Imperative since it emphasizes the universality and consistency of our actions.

Therefore, the principle that is not derived from the Categorical Imperative is: "Act so that the maxim of your action ensures the satisfaction of your desires."