 Hegel admits the existence of right is presupposed from his philosophical system, of which the PR elaborates one part (PR §2). The PR’s Introduction proceeds to summarise the dialectical argument for the free will discussed at greater length elsewhere in Hegel’s philosophical system. Our will “determines itself” (PR §4 Addition). The challenge is determining whether or not its content is a product of freedom or mere arbitrariness. We must be able to discern the bare pursuit of being a slave to our passions like, for Hegel, the animal world from the rational world of human beings. Hegel sees the PR as an examination into how “the free will which wills the free will” can be known in form and content (PR §27).