SFM 2.1 and the Planck Boundary: Cognitive-Structural Admissibility, Continuity Traversal, and Descriptive Language Beneath Classical Spacetime

This paper proposes SFM 2.1 as a cognitive-structural admissibility method for approaching the Planck boundary. The aim is not to claim discovery of what physically exists beneath the Planck scale, nor to replace quantum gravity, string theory, loop quantum gravity, causal set theory, emergent spacetime, or other physical approaches. Rather, the paper asks whether ordinary descriptive language remains admissible unchanged at a boundary where classical spacetime description may lose stability. The central proposition is that the Planck scale may be treated not merely as a smallest physical scale, but as a boundary of descriptive admissibility. Words such as space, time, distance, object, smaller, before, after, inside, outside, measurement, and continuity may carry assumptions inherited from ordinary macroscopic or classical description. If those assumptions no longer hold, then the first problem may not be physical content alone, but language admissibility. Using SFM 2.1 — Persistence Fingerprint Analysis, Persistence Locking Mechanism, Admissibility Interrogation Topology, Recursive Continuity Geometry, and Lineal Continuity Traversal Mathematics — this paper proposes a pre-model method. Before asking what exists below the Planck boundary, SFM asks what must persist, what locks, what becomes inadmissible, and how continuity can traverse when the ordinary spacetime datum line no longer holds. The paper frames cognitive-structural information as a different mathematical starting layer. It does not claim that cognition creates physical reality. It claims that cognition, when formalised through SFM, RCG, and LCTM, may provide a structural language for reasoning at boundaries where ordinary descriptive systems begin to fail.