Deontology:Deontology is an ethical framework that judges the morality of an action based on the action's adherence to a rule or rules, rather than the consequences of the action.
Categorical Imperative:Kant's Categorical Imperative is a moral principle that states that one should 'act only in accordance with that maxim through which you can at the same time will that it become a universal law.'
Duty: Duty refers to the moral obligation to perform certain actions or behave in certain ways, regardless of one's personal desires or the consequences of those actions.