# GRAV-BRIDGE-I v0.1.0 Result Record

## Protocol status

**REGISTERED_EXECUTION**

## Verdict

**NON_GENERALIZING_SIGNAL**

- The structural model improved full-data fit but not galaxy-held-out performance.

## Registered question

Do chamber-defined structural signatures of a galaxy's baryonic acceleration profile improve
prediction of its observed gravitational discrepancy beyond local baryonic acceleration,
normalized radius, and ordinary ladder statistics?

## Data boundary

- Galaxies: 121
- Radial rows: 2975
- Grouped folds: 5
- Cross-galaxy signature permutations: 50
- Galaxy target-curve permutations: 50

## Decisive comparison

- M2 galaxy-balanced RMSE: 0.18838899
- M_IP galaxy-balanced RMSE: 0.19455366
- RMSE delta (M2 − M_IP): -0.00616467
- Relative improvement: -3.2723%
- Bootstrap 95% CI: [-0.01457646, 0.00214961]
- Signature-null p-value: 0.156863
- Target-null p-value: 0.098039

## Interpretive boundary

This result measures incremental out-of-sample prediction only. It is not a derivation of a
field equation, evidence of causation, a lensing result, or a demonstration that dark matter
does not exist.

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## v0.3 project interpretation

This document belongs to the external transfer experiment. Numerical, technical, protocol, or provenance content above is preserved. The transfer result tests one static global architecture: it does not negate the galaxy-specific structural information carried by the curves. Complete curves retain identity, and ρ is the leading channel for local or regime-conditioned follow-up.

