Abstract

This paper continues the analysis of the advantages and disadvantages of ontic structural realism, which begun in the first part of the paper. Non-eliminative versions of this approach are considered, which try to find a compromise between the ontology of structures and the ontology of objects. It is shown that the semirealism of A. Chakravartti and the constructive structural realism of T. Cao have a number of limitations caused by the authors’ desire to strictly distinguish between the nature of the existence of objects and structures. Then the version of the relationship between structures and entities is presented. Firstly, two concepts are divided according to their content: “object” and “entity”. Second, to solve the problem of causality, I suggest that the nature of entities and structures lie in their ability to act. It is this ability that I propose to use instead of the popular concepts of “causal powers”, “causal properties” or “dispositions”. Third, instead of a rigid alternative to ontological primitives – either essence, or causal relations, or structures – the concept of ontological pluralism and inherited existence is proposed. There each entity is represented as a derivative of another structure and, in turn, creates other entities and structures. Thus, both structures and entities at each level of the complexity hierarchy partially inherit the ability to act and a certain degree of existence from the structures and entities of the previous levels. Finally, I am trying to clarify the modal aspects of the ontic structural realism. Following the popular interpretations of quantum theory, the ability to act, and hence the existence of structures and entities, are considered separately in two worlds – potential and actual ones. The potential world is associated with a set of possible objects and structures of quantum theory, and the actual world is associated with a set of real (observable) objects and structures of classical physical theories. The transition from the potential to the actual world is proposed to be considered as a primitive metaphysical event. The proposed concept partially overcomes the objections to ontic structural realism, thereby strengthening its position in the discussion about the reality of quantum objects.