The article discusses verbal nouns with zero formant in the role of the main argument in Polish and Russian scientific texts. The sentences with verbal nouns in nominative case are of informative and logic character. This is why usually non active verbs, denoting mental acts or the interactions cause-effect, occur in the function of the main predicate. Taking the position of the main argument with this kind of predicates, they do not become a semantic subject of the sentence, but the potential predicate. The subject of the main predicate is usually omitted, and the subject of the potential predicate is usually indicated by the genitive form. Removal of the main subject in scientific texts allows to move the logic accent beyond the activity alone.