Countability of material existence: discreteness, continuity or indivisibility

The article formulates the question about the countability of material existence, which is the key question for determining the structure of the universe. There are three answers to this question: material existence is countable, unquantifiable or indivisible. The ontologically grounded and unambiguous definition of the concepts “division of matter” and “motion of matter” allows excluding the variants of unquantifiable and indivisible material existence. By analyzing the known laws of nature development (transition of quantitative changes into qualitative ones and negation of negation) it is evident that they correspond to the countable material being. Isomorphism phenomenon is considered, the existence of which serves as evidence of the ultimate complexity of material existence and, consequently, of its countability. It is stated that being is a totality of matter (in the form of primary particles) and emptiness possessing primary properties determining all the variety of forms and laws of the universe.