# UTFANSWF v21 — Row 20 SN z=0.35 Probe

**Context:** DIAGNOSTIC_NON_GATING

## SN node

| Quantity | Value |
|---|---:|
| data | 43.100000 |
| theory | 41.573176 |
| residual | -0.589104 |
| sigma_diag | 0.223607 |
| diag pull | -2.634554 |
| chi2 contribution | 8.445196 |
| required shift | 1.526824 |
| fractional shift | 3.672619e-02 |

## Interpretation

- SN z=0.35 is a moderate/high pull node contributing significantly to Row 20 stress.
- This node is sensitive to distance-modulus calibration (M_B / ladder effects).

## Verdict

SN_midpoint_calibration_sensitive; diagnostic only; no physics, thresholds, datasets, parameters, or verdict changes.
