{
  "completed_step": "C312",
  "decision_timing": "Selected after the six-comparison test and independent review",
  "next_proposed_step": "C313",
  "executed": false,
  "question": "After expressing the five existing SP Shem-life targets in OFF/Terah0/full430, which preserve the500-year Noah-to-Shem birth binding to the SP Noah endpoint selected by17K with the same Gear and rail?",
  "finite_domain": "Exactly the five admitted SP LXX_OFF Shem-life cases from C312, their already admitted full430/Terah0 equivalents, and the existing529 source-qualified register.",
  "normalization": "+215−60=+155 in BC labels; source-state normalization, not a new free anchor shift.",
  "reason": "C312 explains the5/6 displacement and finite boundary. Testing the distinct500-year Noah/Shem relation connects that result directly to17×529 without repeating the previous Noah/Flood600 test.",
  "constraints": [
    "Preserve source labels and complete Shem-life endpoints",
    "No new endpoints, anchors, phases or Gear scope",
    "Require matching Gear and rail",
    "Retain failures and unavailable fields",
    "Do not treat coordinate equality as a prescribed chronology"
  ],
  "reasoning_level": "High sufficient"
}