 This particular reconstruction of the process of knowledge is justified at the ontological level too. Burley’s earlier view about the metaphysical composition of corporeal beings accounts for the way he approaches questions concerning knowledge. He claims that corporeal beings are constituted by an individual substance and a host of accidental forms inhering in it. Individual substance is then the result of the union of particular matter and form (cf. Quaestiones in librum Perihermeneias, q.4, p. 272). Particular form is itself constituted by a specific form (that is, the essence of the singular thing at issue) and by all of its metaphysical constituents. As we have already seen, it is precisely in the commentary on the De anima (Book I, q.3) that Burley affirms that universals in the category of substance are constitutive parts in the essence of their individuals, and have being in their individuals. All of this enables us to understand better why in his De anima commentary, Burley grants some level of intelligibility to singulars as such, though indirectly and derivatively, and also why he describes elementary knowledge in terms of a classification of things according to which a given singular object is referred back to its ideal type.