SPARC Full Sample Analysis: 175 Galaxies with Derived a₀ (Confluence v1.3)

Application of the gravitational enhancement function derived in The Confluence of Creating (M = C) to all 175 galaxies in the SPARC database (Lelli, McGaugh, Schombert 2016) with zero free parameters. The derived acceleration scale a₀ = cH₀/ (2pi) = 1. 082 x 10^-10 m/s² outperforms MOND's fitted a₀ = 1. 2 x 10^-10 m/s² across the full sample using identical methodology. Core results: median chi-squared reduced = 8. 95 (framework, 0 parameters) vs 10. 51 (MOND, 1 parameter). 90 of 175 galaxies achieve chi-squared reduced below 10 with the derived constant versus 83 with the fitted constant. Quality predictors identified in order of importance: bulge presence (factor of four), enhancement regime depth, galaxy size. Gas fraction has negligible effect. Poor fits are systematic, indicating baryonic mass model errors amplified by the zero-parameter enhancement function. Includes NGC 3198 rotation curve analysis (RMS 9-10 km/s across 30 kpc) and baryonic Tully-Fisher relation (predicted slope exactly 4, observed 3. 85 +/- 0. 09, normalization 69. 6 Mₛun/ (km/s) ⁴). All from the same derived acceleration scale with zero fitted parameters.