Moderate realism (also called immanent realism) is a position in the debate on the metaphysics of universals associated with the hylomorphic substance theory of Aristotle. There is no separate realm in which universals exist (in opposition to Platonic realism, which asserts the formal existence of abstract objects apart from their particulars), nor do they really exist within particulars as universals, but rather universals really exist within particulars as particularised, and multiplied.