Reversible 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.
Universalizable That is an act that anyone can reasonably desire for others to act, for example, choose to borrow more money by promising to repay the money they borrowed. By the borrower knows that it is non-refundable.
Treatment suppose an employer is wondering if there is a moral right to hide the dangerous nature of chemicals used in production from the employees who work with the chemicals. If the employees exclusively as a means to the employer's ends. Since the employer does not have a moral right to do so, it is unethical to hide the dangers from the employees.