Event Grammar (EG): Minimal Definition for Time Emergence from Continuous Difference

This note defines the Event Grammar (EG), a minimal boundary layer that converts continuous pre-semantic difference into indexed events within the "bounded non-closure" framework. Positioned between NSPS (Non-Semantic Processing Structure) and ECE (Exo-Centered Equilibrium), EG specifies the conditions—Threshold, Persist, and TraceBind—under which continuous candidate differences become determinate events (\Delta^*). The paper formalizes the emergence of time not as a background flow, but as a result of "Commit" operations that trigger index updates (i_{n+1}). EG provides the structural rule for how a continuous D–P–R signal field is discretized into the runtime units utilized in subsequent causal models.