According to Immanuel Kant, what is it that makes humans uniquely worthy of respect? What, for Kant, does it mean for humans to be free? What is the motive Kant thinks we must have in order for an act to have moral worth, and why does he think this? Identify and explain Kant's two formulations of the Categorical Imperative. How does Kant arrive at the idea of the Categorical Imperative as the moral law for humanity to follow? In your view, what is the biggest weakness of Kant's philosophy of ethics? Does this weakness invalidate the theory altogether?