Pythagorean Frustum Unified System V10.1 Logical Origin Theory: Ultimate Pure Logic Edition

Taking Primordial Unity as the sole origin, this paper strictly defines the essence and origin of logic, and establishes the core principle that logic is the law of existence, not the law of background. All redundant content is removed to focus on the pure logical mainline. It clarifies that coupling 0 is a logical interface rather than absolute nothingness, and constructs a self-consistent, closed and complete axiomatic system of pure logic, providing the underlying logical foundation for the entire unified theory.