In the paper there is presented the semantic interpretation of idealism/realism controversy which is one of the most essential issues in Ingarden's phenomenological project of ontology. The procedure of semantic paraphrase which is contemporary developed by Woleński, is the main interpretative tool. In the central part of the paper, there is formulated the formal theory of the semantic framework underlying idealism/realism discourse. Finally, there are formulated some notes showing that intentional conception of negation may be used for defending various idealistic positions.