There is this notion of “Natural Law” which, strictly speaking, is a contradiction in terms: either it is natural, in which case it is not instituted as such, or it is a law, in which case it is the product of convention. Even if all humans were to agree, by promulgating the relevant legislation, that the Sun must no longer rise from the East or that bodily organs should thenceforth perform other arbitrary functions, such a convention would not affect the pragmata because their being and modality is not contingent on human: human is not the measure of pragmata.