Projection Horizon Theory: On the Structural Limits of Physical Description

Physical theories successfully describe a wide range of phenomena, yet theysystematically fail at their extreme limits. This work introduces Projection Horizon Theory, a structural framework thatformalizes the conditions under which physical description itself remainsmeaningful. Rather than proposing new physical laws or entities, the theorycharacterizes physics as a projective layer arising from an underlyingstructure and identifies projection horizons beyond which physical conceptsbecome inapplicable. Projection Horizon Theory provides a unified interpretation of singularities,cosmological horizons, irreversibility, and unification boundaries as limits ofphysical description, without extending physical ontology or modifyingexisting physical theories.