The assessment of the factuality of the syntactically subordinated proposition

The article presents a method to define the factuality status of a proposition in the sphere of the natural languahe processing. A particular emphasis is placed upon syntactically subordinated propisitions. The term "factuality status" is defined by introduction of its three components, the core component is the so-called "epistemic value". The essence of the method is the hierarchical alignement of the predicates of the constructions in a polipredicative sentence. An epistemic value is assigned to every predicate by a set of rules and a dictionary.