Did Rand Implicitly Implement the Concept of Duty in Her Moral System? in Benevolist Ponderings A blog by Lukon in General Posted August 2, 2010 you are confusing concepts. Concepts are different than the words we use to define them. If i agree or disagree is not relevant to this discussion what is is the terms and concepts being used. The term duty as you are using it is not the same as the term as Rand used it. Remember Rand was fighting Kant and his definition of the term duty, this is as opposed to what you seem to mean by duty. duty as I understand your use of the term is an obligation to act in accordance with Justice, where as Kant held that duty was an unearned obligation. Kant held that you have a duty to your parents because they are your parents Duty as you seem to define it is you have an obligation to your parents if they are moral and just.