Ontological Distinctions and Their Domain Dependence

Philosophical distinctions do not carry their validity with them across contexts. This paper begins from a broader philosophical problem: why do universal ontologies so often fail when their distinctions are extended beyond the domains that sustain them? It examines how key philosophical distinctions—such as object, identity, causality, and structure—depend on the domains in which they operate. It argues that when moving between domains, the differences these distinctions rely on may not be preserved. In such cases, they lose their discriminative power and cannot be applied in the same way. The paper distinguishes between two ways of extending concepts: attempting to preserve them invariantly and adapting them to new structural conditions. It argues that successful cross-domain use typically requires transformation rather than invariant preservation. This work is the conceptual part of a two-paper project. A companion paper (DOI: 10.5281/zenodo.19547143) develops a formal categorical analysis and shows that when domain transitions collapse distinctions, invariant reconstruction becomes structurally impossible. The present paper provides the philosophical framework that explains why such failures are not accidental, but arise from the structural limits of universal ontological extension.