Thought experiment explores the implications of observational inaccessibility in entities beyond black hole event horizons, indicating new ontological perspectives.
Short Abstract This paper presents a thought experiment that reexamines the ontological implications of observational inaccessibility at black hole event horizons and introduces DMF (Dynamic Mass Flow) as a descriptive concept for the continued existence of entities that have transitioned beyond observability. Contemporary physics recognizes that information crossing an event horizon becomes, in principle, inaccessible to external observers. However, the mode of existence assumed by matter, energy, and information after this transition remains largely unspecified. Without introducing new particles, forces, or physical laws, this study explores a minimal ontological framework in which observational inaccessibility itself is treated as a legitimate mode of existence. Based on the premise that observational inaccessibility does not imply non-existence, a series of thought experiments is developed in which entities crossing an event horizon undergo a transition from an observable phase to an observationally inaccessible phase. This phase is designated as DMF. The paper examines the logical consistency of this concept, its relation to indirect observation, and its compatibility with the hierarchical BFSSU cosmological framework. The analysis suggests that DMF should not be regarded as a competing physical theory, but rather as a minimal ontological supplement to domains where existing theories intentionally remain silent. The proposed framework offers a conceptual basis for treating observational inaccessibility not as ignorance or absence, but as a valid mode of existence. https://orcid.
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Takafumi et al. (2026) studied this question.
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