Certainty: the object field and the basis for differentiation

The article analyzes the correlation of the modes of definiteness introduction. The basic mode of definiteness introduction is revealing of the certainty that constitutes a subject (in terms of logic). Working with the necessity of the certainty involves understanding of the certainty as a predicate. The author compares the modes of definiteness introduction both in the model of certainty as a subject and in the model of certainty as a predicate.