Abstract

The question concerning the ontic nature of space-time points and of space-time itself - is the question: are these objects set-theoretic sets or individuals, i.e. nonsets? Two classifications of the standpoints concerning the nature of these objects are formulated and then they are intersected. In concequence three standpoints appear: mereological substantivalism, set-theoretic substantivalism and set-theoretical relationism; it is showed that mereological relationism is not real. It is proved that set-theoretic standpoints logically imply so called set-theoretic realism which accepts the existence of sets (if Quine's conception of existence is assumed)