Pre-registered analysis maps operator switch and rejects CDN-174 as a D9 holdout observable.
CDN-196 maps the frozen CDN-195 operator switch over delta and identifies the source-to-phase-gradient crossing at delta = 0.085585203, or xi = 21.909812 for sigma = 16. It also rejects CDN-174 as a D9 holdout observable because CDN-174 measures finite-time acoustic excess, not a CDN-179-style asymptotic floor. The next valid test is pre-registered at delta = 0.09, xi = 23.04, with frozen predicted asymptotic floor eps_inf = 0.029910 and tolerance 0.006.
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Nicky Joseph Hubertus Catharina Hacquier (2026) studied this question.
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