The central argument of this article turns on the dual‐nature thesis. This thesis sets out the claim that law necessarily comprises both a real or factual dimension and an ideal or critical dimension. The dual‐nature thesis is incompatible with both exclusive legal positivism and inclusive legal positivism. It is also incompatible with variants of non‐positivism according to which legal validity is lost in all cases of moral defect or demerit (exclusive legal non‐positivism) or, alternatively, is affected in no way at (...) all by moral defects or demerits (super‐inclusive legal non‐positivism). The dual nature of law is expressed, on the one hand, by the Radbruch formula, which says that extreme injustice is not law, and, on the other, by the correctness argument, which says that law's claim to correctness necessarily includes a claim to moral correctness. Thus, what the law is depends not only on social facts, but also on what the law ought to be. (shrink)

In the debate between positivism and non-positivism the argument from relativism plays a pivotal role. The argument from relativism, as put forward, for instance, by Hans Kelsen, says, first, that a necessary connection between law and morality presupposes the existence of absolute, objective, or necessary moral elements, and, second, that no such absolute, objective, or necessary moral elements exist. My reply to this is that absolute, objective, or necessary moral elements do exist, for human rights exist, and human rights exist (...) because they are justifiable. (shrink)

En el debate entre el positivismo y el no-positivismo el argumento del relativismo tiene un papel fundamental. Tal y como es presentado, por ejemplo, por Hans Kelsen, este argumento señala, en primer lugar, que una conexión necesaria entre el derecho y la moral presupone la existencia de elementos morales objetivos, absolutos y necesarios, y, en segundo lugar, que estos elementos morales objetivos, absolutos y necesarios no existen. Mi respuesta a esto es que los elementos morales absolutos, objetivos y necesarios existen, (...) porque los derechos humanos existen, y éstos existen porque son fundamentables. In the debate between positivism and non-positivism the argument from relativism plays a pivotal role. The argument from relativism, as put forward, for instance, by Hans Kelsen, says, first, that a necessary connection between law and morality presupposes the existence of absolute, objective, or necessary moral elements, and, second, that no such absolute, objective, or necessary moral elements exist. My reply to this is that absolute, objective, or necessary moral elements do exist, for human rights exist, and human rights exist because they are justifiable. (shrink)