Geometric Three-Basin Multiverse from Modal Theory and General Emergence Mechanics - Exactly Three Universes from a Single Z_3 Orbifold Structure

Modal Theory's Z3 orbifold structure produces exactly three degenerate vacuum basins before chiral symmetry breaking. The loop-suppressed bias term selects the 255° minimum as the unique global attractor of our observable universe, but the remaining basins at 60° and 180° are not eliminated — they are real and permanent features of the same vacuum landscape. General Emergence Mechanics provides the language in which each basin constitutes a geometrically distinct universe with its own coherence shell, persistence threshold, relaxation timescale, and effective physical constants. The three universes differ in their CP-like phase, effective fine-structure analogue, arrow of time, and conditions for persistent complexity. Inter-basin barriers correspond to infinite persistence-depth walls, rendering direct access between universes impossible while preserving their full mathematical reality. Unlike string landscape proposals admitting vast unconstrained numbers of vacua, this framework predicts exactly three universes, fully determined by the same geometric structure that generates the fermion generational hierarchy, CP violation, and the arrow of time in our own universe. A refined ontological boundary is proposed: outside any universe lies either sub-threshold excitations that fail to persist, or trans-basin structures that persist in a geometrically distinct vacuum beyond an infinite depth barrier.