Final answer:
The claim that Immanuel Kant's supreme principle of morality was the Ten Commandments is false. His moral philosophy is based on the categorical imperative, not religious doctrine, and emphasizes universal moral laws derived from reason.
Step-by-step explanation:
The statement that the supreme principle of morality, according to Immanuel Kant, was the Ten Commandments is false. Immanuel Kant's fundamental principle of morality is the categorical imperative, which is distinct from the Ten Commandments. The categorical imperative focuses on the universality of moral laws, which can be discerned using reason, rather than directives from a deity as seen in Divine Command Theory.
Kant proposed that an action is moral if it adheres to the maxim, "Act only according to that maxim whereby you can, at the same time, will that it should become a universal law". This implies that one's actions should be reflective of what they would want everyone to follow as a universal rule. Central to Kant's theory is the idea that moral imperatives are determined by rationality, not by scripture or divine command.
Furthermore, the deontological approach, which Kant is known for, emphasizes duties and rules that apply universally, such as the duty to always tell the truth, rather than following specific religious codes or laws.