ABSTRACT
Like idealism-materialism, like empiricism-rationalism-mysticism, like determinism-indeterminism, and a few other principles, the theory of realism-nominalism is one of the most general and contains fundamental principles which compose a framework for the system of truth and knowledge of a given period. Bylogico-ontological realismis meant a system of thought which claims that in all singularistic objects or subjects of the same class some essence or element which is common to all of them and which composes their essence or their universalia. Thus conceptualism occupies an intermediary position between realism and nominalism. With realism it agrees in that the general concepts exist in our mind, but disagrees in that the universalia exist in the transsubjective world. With nominalism it agrees in that there are no universalia in the transsubjective world, but disagrees in admission of the reality of the universalia in our mind—which is denied by nominalism.
