 And as he explained in another important commentary on the Methods, “The Establishment of Ethical First Principles,” he accepts Aristotle’s distinction between logical priority and priority in the knowledge of a particular person, such that we “are thus enabled to see that a proposition may be self-evident, i.e., may be properly cognisable without being viewed in connexion with any other propositions; though in order that its truth may be apparent to some particular mind, there is still required some rational process connecting it with propositions previously accepted by that mind.” This latter can be done in two ways: by showing how “some limited and qualified statement” supposed to be self-evident is only part of a “simpler and wider proposition,” on which the limitations turn out to be arbitrary, and by establishing some general criteria “for distinguishing true first principles” that are then used to “construct a strictly logical deduction by which, applying their general criteria to the special case of ethics, we establish the true first principles of this latter subject” (Sidgwick 1879: 106–7). Truth being one, both tactics should ultimately converge on the same conclusions.