La Profilée - The Fine-Structure Constant as a Persistence Bound: The Joint K–F Constraint and Co-Degradation Prediction

The Fine-Tuning of α is standardly framed as a condition for atomic and molecular stability. This paper derives a structurally prior result: α constrains both K(θ) and F(θ) simultaneously, and these constraints are not independent — they co-degrade. The non-obvious structural prediction is the K–F Co-Degradation Prediction: there is no regime in which K fails while F holds, or vice versa, for electromagnetic interaction. K and F degrade together as α moves away from the admissible interval, at a rate determined by their structural coupling. Standard physics treats atomic stability and molecular integration as distinct phenomena. LP derives them as jointly constrained manifestations of the same structural condition.