Uniqueness Argument for the First Principles of YuanXian Theory and Its Universal Derivation: Centered on the Axiom of True-Circle Self-Consistency (TCSC)

This paper establishes the ultimate logical starting point of YuanXian Theory: the Axiom of True-Circle Self-Consistency (TCSC). Through rigorous argumentation, it proves that the universe, as an absolutely isolated, self-contained, and self-referential closed system, serves as the sole first principle of the theory. The paper provides a detailed derivation of how this principle necessitates the Four Core Axioms, the 64-dimensional topological substrate (T^64), and fundamental physical constants such as the fine-structure constant. This research eliminates free parameters and ad hoc assumptions, constructing a seamless logical chain from first principles to physical phenomena for a "Theory of Everything. " 本文确立了元宪理论的终极逻辑起点——真圆自洽性公理 (TCSC) 。通过严格的逻辑论证, 本文证明了宇宙作为一个绝对孤立、自包含、自我指涉的闭合系统, 是元宪理论唯一的第一性原理。文中详细推演了该原理如何逻辑必然地导出元宪四大公理、宇宙 64 维拓扑基底 (T^64) 以及精细结构常数 等物理核心要素。本研究消除了理论体系中的自由参数与预设前提, 为“万物理论”构建了从第一性原理到物理现象的无断点逻辑链。