EXPERIMENT 55 VERIFICATION
==========================
Compilation tested successfully.
Execution tested successfully.

Replay seed:
9783790101901

Scenarios: 30
Dataset modes per scenario: 2
Total executions: 60
Compile errors: 0
Runtime errors: 0

This is a diagnostic replay of the Experiment 51 holdout.
It adds no independent paired evidence.

Matched contrasts:

Success 06 -> Control 24
- standard family: REAR_BOUNDARY_LOCK
- success/control perturbation family:
  B_MINIMAL_LATE / B_MINIMAL_LATE
- success/control delta: +9 / 0
- first divergence: 102 / 114
- differing positions: 2 / 2
- standard dependency depth: 7 / 2
- standard critical tree size: 7 / 2
- required blockers: 2 / 2
- yield type:
  NO_YIELD_OCCUPANT / NO_YIELD_OCCUPANT
- prerequisite:
  ANOTHER_ACTIVE_SEAT_EVENT / INSUFFICIENT_REAR_YIELD_SPACE
- dispersion dependency depth: 0 / 2

Success 19 -> Control 10
- standard family: REAR_BOUNDARY_LOCK
- success/control perturbation family:
  B_MINIMAL_LATE / D_OTHER_PERTURBATION
- success/control delta: +5 / 0
- first divergence: 103 / 10
- differing positions: 2 / 2
- standard dependency depth: 5 / 3
- standard critical tree size: 5 / 3
- required blockers: 2 / 3
- yield type:
  NO_YIELD_OCCUPANT / NO_YIELD_OCCUPANT
- prerequisite:
  INSUFFICIENT_REAR_YIELD_SPACE / INSUFFICIENT_REAR_YIELD_SPACE
- dispersion dependency depth: 0 / 3

Success 25 -> Control 22
- standard family: LINKED_ROW_EVENT_CHAIN
- success/control perturbation family:
  C_BROAD_EARLY / B_MINIMAL_LATE
- success/control delta: +10 / 0
- first divergence: 23 / 129
- differing positions: 6 / 2
- standard dependency depth: 9 / 11
- standard critical tree size: 9 / 11
- required blockers: 1 / 2
- yield type:
  ACTIVE_EVENT_TRANSIENT / ACTIVE_EVENT_TRANSIENT
- prerequisite:
  YIELD_TILE_OCCUPIED / YIELD_TILE_OCCUPIED
- dispersion dependency depth: 0 / 11

Aggregate:
- successful cases: 3
- matched contrasts: 3
- unmatched successes: 0
- captured successful gain: +24
- average first divergence success/control: 76.00 / 84.33
- average differing positions success/control: 3.33 / 2.00
- average standard dependency depth success/control: 7.00 / 5.33
- average standard critical tree size success/control: 7.00 / 5.33
- average required blockers success/control: 1.67 / 2.33

Interpretation:
All successful cases obtained unique same-residual-family controls.

No single raw structural magnitude universally separates success from neutral:
the linked-row successful case had a smaller tree than its control, whereas
both rear-boundary successes had larger trees than their controls.

The decisive post-run distinction remains complete dependency collapse under
dispersion versus preserved dependency depth in the controls.

This is explanatory evidence, not a prospective predictor.

Official findings require the user's saved run.
