Structural Determination Theory I: Structural Determination of the Differentiation Space

This revised version further refines the structural presentation and foundational formulation of the framework. The manuscript has been reorganized for improved theorem-style cadence, reduced repetition, and clearer structural hierarchy. Terminology and notation have been unified throughout, with additional refinements to the presentation of pairwise differentiation, structural exhaustion, and the joint differentiation space generated by the primitive binary-valued framework.