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@@ -55,3 +55,14 @@ have lower held-out residual bias and higher task accuracy than the matched
intercept-only arm. Final evidence additionally requires multiple seeds, a
frozen probe cadence, measurement noise/quantization, and the strong-clamp
baseline.
+
+R0 did not pass this gate. Clean positive EP reached 53.2% after one epoch and
+the raw released-profile arm reached 40.0%. With only the initial probe,
+intercept and affine predictors were exactly matched at 49.9%. At cadence 10,
+affine SDIL reached 49.9% versus 44.8% for the intercept, but its final relative
+residual was higher (`9.51e-4` versus `5.95e-4`). At cadence 50, affine SDIL
+had a slightly lower residual (`7.42e-3` versus `7.55e-3`) but lower accuracy
+(47.1% versus 48.4%). No cadence improved both mechanism and task performance,
+so R0 is ambiguous negative development evidence and is not promoted. The
+stable centered-EP backbone identified by C0 is required before further task
+confirmation.