Final answer:
The question discusses the philosophical concept of human rights and whether they can be forfeited. Philosophers like Kant have argued for inviolable perfect duties, while others like Ross and Locke recognize the complexity of rights.
Step-by-step explanation:
The discussion on whether all rights are inviolable or whether some rights can be forfeited due to actions by individuals such as criminals or the insane draws upon philosophical debates about the nature of human rights and duties. Philosophers like Immanuel Kant proposed that there are perfect duties, which are absolute and must always be followed, suggesting that rights associated with these duties would be inviolable. Whereas, Sir William David Ross argued against the notion of absolute duties by putting forward the concept of prima facie duties, which acknowledges that duties can sometimes conflict and rights might not be absolute.
John Locke's natural rights philosophy indicates that certain rights are inherent and inalienable, yet historical perspectives and modern governance systems recognize circumstances where rights can be limited, as in the case of criminals or individuals who are deemed a danger to society. This suggests that while rights are fundamental, their application can be contingent upon certain societal norms and legal judgments.