What Quantum Theory Does Not Permit: A Process–Event Constraint on Physical Realization

This work continues and consolidates a series of conceptual papers developed over an extended period, aimed at clarifying the physical domain of validity of quantum theory. Rather than presenting a new interpretation or extending the formalism, the present contribution serves as a unifying and delimiting statement. It explicitly formulates what quantum theory does not permit to be physically asserted when its formal descriptions are applied beyond conditions of realization. The motivation for publishing this work at this stage is to provide a coherent and self-contained articulation of the process–event constraint that has been developed across earlier discussions, drafts, and case analyses. Several examples—most notably from chemical bonding and spectroscopy—are included here in a compact and finalized form, not as an expansion of scope, but as confirmation that the framework applies consistently beyond abstract foundational scenarios. This manuscript is intended as a stable reference point that closes a conceptual loop, rather than as an open-ended extension of the series.