Before Evolution: Structural Admissibility and the Logical Preconditions of Life

Evolution by natural selection explains how living systems adapt and diversify, yet it presupposes the existence of a system already capable of storing, replicating, and translating functional information. Before selection can operate, a transition must occur from unconstrained chemistry to an information-preserving biological organization. This paper argues that the origin of life is fundamentally a problem of structural admissibility. Within the Theory of Axiomatic Necessity (TNA) framework, unconstrained molecular interactions operate in the descriptive domain (N₀), while life emerges when molecular organization satisfies a coherence restriction (R), instantiating a biological admissibility domain (N₁). Under this view, evolutionary dynamics represent a process of structural incoherence reduction (dIₛ/dt ≤ 0), through which living systems minimize incompatibility with their environmental constraints. Consequently, evolution does not generate the logical conditions for its own initiation; it operates only after an admissible informational organization has been established.