Later on, due to the Principle’s increasing importance to him, and to Ockham’s direct criticisms of it (some of which are recorded, for example in his Quodlibeta Septem I, 5), Chatton developed a long defense for the Principle and a richer formulation of it. The richest formulation of the Principle we have is from Lectura I, d. 3, q. 1, a. 1: