 This is partly because he looks at being as a subject matter requiring consideration of the categories; of terms or properties which transcend the categories; of infinite and finite beings; and even—as indispensable but falling outside the remit of the metaphysician proper—the study of beings of reason (entia rationis), that is, beings which do not in fact exist, such as fictitious entities, privations, and various forms of abstraction, all of which, Suárez insists, force themselves into view, despite their non-existence.