Immanuel Kant is the founder of German classical philosophy of duty ethics, word deontology comes from the Greek words of duty and science.
Immanuel questioned reality by arguing that we only believe in the things that we know about and are sure to exist. But in reality, there are numerous things that exist, yet stay unknown to us.
Kant was best known for his contributions to philosophy.
Immanuel Kant, a German philosopher, calls the principles Categorical Imperatives, which are defined by their morality and level of freedom.