{
  "status": "complete_eight_seed_comparison",
  "sources": {
    "LongVideo-Reason": {
      "common_questions": 396,
      "added_by_visual_and_type_rerank": {
        "questions": 104,
        "eligible_questions": 104,
        "complete_questions": 104,
        "hard_0_to_3": 16,
        "success_fraction": 0.8305288461538461
      },
      "replaced_qa_only": {
        "questions": 104,
        "eligible_questions": 104,
        "complete_questions": 104,
        "hard_0_to_3": 22,
        "success_fraction": 0.7211538461538461
      }
    },
    "ReWatch": {
      "common_questions": 377,
      "added_by_visual_and_type_rerank": {
        "questions": 32,
        "eligible_questions": 32,
        "complete_questions": 32,
        "hard_0_to_3": 10,
        "success_fraction": 0.6953125
      },
      "replaced_qa_only": {
        "questions": 32,
        "eligible_questions": 32,
        "complete_questions": 32,
        "hard_0_to_3": 11,
        "success_fraction": 0.60546875
      }
    },
    "Video-HopChain": {
      "common_questions": 345,
      "added_by_visual_and_type_rerank": {
        "questions": 155,
        "eligible_questions": 155,
        "complete_questions": 155,
        "hard_0_to_3": 150,
        "success_fraction": 0.08629032258064516
      },
      "replaced_qa_only": {
        "questions": 155,
        "eligible_questions": 155,
        "complete_questions": 155,
        "hard_0_to_3": 143,
        "success_fraction": 0.11693548387096774
      }
    },
    "Video-R2": {
      "common_questions": 441,
      "added_by_visual_and_type_rerank": {
        "questions": 59,
        "eligible_questions": 59,
        "complete_questions": 59,
        "hard_0_to_3": 8,
        "success_fraction": 0.8411016949152542
      },
      "replaced_qa_only": {
        "questions": 59,
        "eligible_questions": 59,
        "complete_questions": 59,
        "hard_0_to_3": 9,
        "success_fraction": 0.8199152542372882
      }
    }
  },
  "interpretation": "Descriptive change in selected question difficulty; fusion includes a reasoning-type bonus. Not an isolated causal visual ablation or downstream training gain."
}