{
  "experiment": "A75 observation-conditioned Pareto ranker audit",
  "protocol": {
    "source_a64": "/home/jiachen/TRELLIS/experiments/nonorthogonal_gpt_orthoview/outputs/data_survey/vggt_spatial_adapter/support_guidance_a64_per_view_residual_decomposition_audit/analysis.json",
    "source_a65": "/home/jiachen/TRELLIS/experiments/nonorthogonal_gpt_orthoview/outputs/data_survey/vggt_spatial_adapter/support_guidance_a65_per_region_signed_residual_audit/analysis.json",
    "source_a73": "/home/jiachen/TRELLIS/experiments/nonorthogonal_gpt_orthoview/outputs/data_survey/vggt_spatial_adapter/support_guidance_a73_per_region_lambda_pareto/analysis.json",
    "source_a74": "/home/jiachen/TRELLIS/experiments/nonorthogonal_gpt_orthoview/outputs/data_survey/vggt_spatial_adapter/support_guidance_a74_loo_pareto_ranker_audit/analysis.json",
    "selection_uses_gt": false,
    "retrospective_validation_uses_gt": true,
    "candidate_space": "A73 per-region lambda candidates",
    "observation_features": [
      "best_mvd_iter",
      "best_mvd_delta",
      "all_view_nonworse timing",
      "late_safe_signal",
      "early_mv_paradox_damage",
      "local_damage_flag",
      "conflict/visible abs residual deltas"
    ],
    "limitation": "A75 maps trajectory-level observation signals to A73 lambda candidates at case level. It is a retrospective bridge audit, not a true candidate-specific render evaluation for every lambda mesh."
  },
  "aggregate": {
    "active_case_count": 3,
    "ten_case_count": 10,
    "rankers": {
      "a75_observation_diagnostic_prior": {
        "ranker": "a75_observation_diagnostic_prior",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 3,
        "mean_delta_chamfer_10case": -0.00021071275096757325,
        "mean_delta_fscore_10case": 0.0012269111765245365,
        "mean_joint_score_10case": -0.00030886564508953617,
        "gap_to_a73_oracle_joint": 0.0,
        "gap_to_a53_reference_joint": 7.598458527211042e-05,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "scalar_1.250",
            "target_label": "scalar_1.25",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0004915772919945327,
            "delta_fscore_vs_carrier": -0.00437328029277656,
            "joint_score": -0.00014171486857240788,
            "on_pareto_front": true
          },
          "gso_002_input4": {
            "candidate": "scalar_1.250",
            "target_label": "scalar_1.25",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0013525748505217317,
            "delta_fscore_vs_carrier": 0.015246453821315398,
            "joint_score": -0.0025722911562269636,
            "on_pareto_front": true
          },
          "gso_008_input4": {
            "candidate": "probe_v0.000_c0.750_r0.000",
            "target_label": "conflict_0.75",
            "lambdas": {
              "surface_improved": 0.0,
              "surface_conflict": 0.75,
              "surface_neutral": 0.0,
              "unobserved_closable": 0.0
            },
            "delta_chamfer_vs_carrier": -0.0002629753671594681,
            "delta_fscore_vs_carrier": 0.0013959382367065287,
            "joint_score": -0.00037465042609599044,
            "on_pareto_front": true
          }
        }
      },
      "a75_observation_conservative_prior": {
        "ranker": "a75_observation_conservative_prior",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 2,
        "mean_delta_chamfer_10case": -0.00018614602520538454,
        "mean_delta_fscore_10case": 0.0012224407911581748,
        "mean_joint_score_10case": -0.0002839412884980385,
        "gap_to_a73_oracle_joint": 2.4924356591497657e-05,
        "gap_to_a53_reference_joint": 0.00010090894186360808,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "scalar_1.000",
            "target_label": "hard_lambda_1",
            "lambdas": {
              "surface_improved": 1.0,
              "surface_conflict": 1.0,
              "surface_neutral": 1.0,
              "unobserved_closable": 1.0
            },
            "delta_chamfer_vs_carrier": -0.0002459100343726456,
            "delta_fscore_vs_carrier": -0.004417984146440179,
            "joint_score": 0.00010752869734256874,
            "on_pareto_front": false
          },
          "gso_002_input4": {
            "candidate": "scalar_1.250",
            "target_label": "scalar_1.25",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0013525748505217317,
            "delta_fscore_vs_carrier": 0.015246453821315398,
            "joint_score": -0.0025722911562269636,
            "on_pareto_front": true
          },
          "gso_008_input4": {
            "candidate": "probe_v0.000_c0.750_r0.000",
            "target_label": "conflict_0.75",
            "lambdas": {
              "surface_improved": 0.0,
              "surface_conflict": 0.75,
              "surface_neutral": 0.0,
              "unobserved_closable": 0.0
            },
            "delta_chamfer_vs_carrier": -0.0002629753671594681,
            "delta_fscore_vs_carrier": 0.0013959382367065287,
            "joint_score": -0.00037465042609599044,
            "on_pareto_front": true
          }
        }
      },
      "a73_weak_proxy": {
        "ranker": "a73_weak_proxy",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 0,
        "mean_delta_chamfer_10case": -8.858090957966635e-06,
        "mean_delta_fscore_10case": 0.0002588703647283558,
        "mean_joint_score_10case": -2.9567720136235098e-05,
        "gap_to_a73_oracle_joint": 0.0002792979249533011,
        "gap_to_a53_reference_joint": 0.0003552825102254115,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "template_v0.350_c1.000_n0.700_u0.500",
            "target_label": "a73_weak_proxy",
            "lambdas": {
              "surface_improved": 0.35,
              "surface_conflict": 1.0,
              "surface_neutral": 0.7,
              "unobserved_closable": 0.5
            },
            "delta_chamfer_vs_carrier": 7.412520754446206e-05,
            "delta_fscore_vs_carrier": -0.0020922470471264054,
            "joint_score": 0.0002415049713145745,
            "on_pareto_front": false
          },
          "gso_002_input4": {
            "candidate": "probe_v0.250_c0.750_r0.500",
            "target_label": "a73_weak_proxy",
            "lambdas": {
              "surface_improved": 0.25,
              "surface_conflict": 0.75,
              "surface_neutral": 0.5,
              "unobserved_closable": 0.5
            },
            "delta_chamfer_vs_carrier": -0.00016072670042127646,
            "delta_fscore_vs_carrier": 0.004680678456703502,
            "joint_score": -0.0005351809769575566,
            "on_pareto_front": false
          },
          "gso_008_input4": {
            "candidate": "probe_v0.250_c0.750_r0.500",
            "target_label": "a73_weak_proxy",
            "lambdas": {
              "surface_improved": 0.25,
              "surface_conflict": 0.75,
              "surface_neutral": 0.5,
              "unobserved_closable": 0.5
            },
            "delta_chamfer_vs_carrier": -1.979416702851955e-06,
            "delta_fscore_vs_carrier": 2.7223770646123135e-07,
            "joint_score": -2.0011957193688534e-06,
            "on_pareto_front": false
          }
        }
      },
      "a74_loo_linear_ranker": {
        "ranker": "a74_loo_linear_ranker",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 1,
        "mean_delta_chamfer_10case": -8.342649668938857e-06,
        "mean_delta_fscore_10case": 0.000526318821946034,
        "mean_joint_score_10case": -5.044815542462158e-05,
        "gap_to_a73_oracle_joint": 0.00025841748966491456,
        "gap_to_a53_reference_joint": 0.00033440207493702504,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "template_v0.000_c0.250_n0.000_u0.000",
            "target_label": "a74_loo_linear_ranker",
            "lambdas": {
              "surface_improved": 0.0,
              "surface_conflict": 0.25,
              "surface_neutral": 0.0,
              "unobserved_closable": 0.0
            },
            "delta_chamfer_vs_carrier": -1.6517501536125745e-05,
            "delta_fscore_vs_carrier": 0.0002714689146069982,
            "joint_score": -3.82350147046856e-05,
            "on_pareto_front": true
          },
          "gso_002_input4": {
            "candidate": "template_v0.000_c0.250_n0.000_u0.000",
            "target_label": "a74_loo_linear_ranker",
            "lambdas": {
              "surface_improved": 0.0,
              "surface_conflict": 0.25,
              "surface_neutral": 0.0,
              "unobserved_closable": 0.0
            },
            "delta_chamfer_vs_carrier": -0.00018290534042341572,
            "delta_fscore_vs_carrier": 0.00447639849322734,
            "joint_score": -0.0005410172198816029,
            "on_pareto_front": false
          },
          "gso_008_input4": {
            "candidate": "scalar_1.250",
            "target_label": "a74_loo_linear_ranker",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": 0.0001159963452701529,
            "delta_fscore_vs_carrier": 0.0005153208116260022,
            "joint_score": 7.477068034007273e-05,
            "on_pareto_front": false
          }
        }
      },
      "hard_lambda_1": {
        "ranker": "hard_lambda_1",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 0,
        "mean_delta_chamfer_10case": -8.919863608208289e-05,
        "mean_delta_fscore_10case": 0.0007678604195963223,
        "mean_joint_score_10case": -0.00015062746964978867,
        "gap_to_a73_oracle_joint": 0.0001582381754397475,
        "gap_to_a53_reference_joint": 0.00023422276071185792,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "scalar_1.000",
            "target_label": "hard_lambda_1",
            "lambdas": {
              "surface_improved": 1.0,
              "surface_conflict": 1.0,
              "surface_neutral": 1.0,
              "unobserved_closable": 1.0
            },
            "delta_chamfer_vs_carrier": -0.0002459100343726456,
            "delta_fscore_vs_carrier": -0.004417984146440179,
            "joint_score": 0.00010752869734256874,
            "on_pareto_front": false
          },
          "gso_002_input4": {
            "candidate": "scalar_1.000",
            "target_label": "hard_lambda_1",
            "lambdas": {
              "surface_improved": 1.0,
              "surface_conflict": 1.0,
              "surface_neutral": 1.0,
              "unobserved_closable": 1.0
            },
            "delta_chamfer_vs_carrier": -0.0007109428880553853,
            "delta_fscore_vs_carrier": 0.010600440139579947,
            "joint_score": -0.001558978099221781,
            "on_pareto_front": false
          },
          "gso_008_input4": {
            "candidate": "scalar_1.000",
            "target_label": "hard_lambda_1",
            "lambdas": {
              "surface_improved": 1.0,
              "surface_conflict": 1.0,
              "surface_neutral": 1.0,
              "unobserved_closable": 1.0
            },
            "delta_chamfer_vs_carrier": 6.486656160720194e-05,
            "delta_fscore_vs_carrier": 0.0014961482028234552,
            "joint_score": -5.482529461867447e-05,
            "on_pareto_front": false
          }
        }
      },
      "a73_gt_oracle_upper_bound": {
        "ranker": "a73_gt_oracle_upper_bound",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 3,
        "mean_delta_chamfer_10case": -0.00021071275096757325,
        "mean_delta_fscore_10case": 0.0012269111765245365,
        "mean_joint_score_10case": -0.00030886564508953617,
        "gap_to_a73_oracle_joint": 0.0,
        "gap_to_a53_reference_joint": 7.598458527211042e-05,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "scalar_1.250",
            "target_label": "gt_oracle",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0004915772919945327,
            "delta_fscore_vs_carrier": -0.00437328029277656,
            "joint_score": -0.00014171486857240788,
            "on_pareto_front": true
          },
          "gso_002_input4": {
            "candidate": "scalar_1.250",
            "target_label": "gt_oracle",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0013525748505217317,
            "delta_fscore_vs_carrier": 0.015246453821315398,
            "joint_score": -0.0025722911562269636,
            "on_pareto_front": true
          },
          "gso_008_input4": {
            "candidate": "probe_v0.000_c0.750_r0.000",
            "target_label": "gt_oracle",
            "lambdas": {
              "surface_improved": 0.0,
              "surface_conflict": 0.75,
              "surface_neutral": 0.0,
              "unobserved_closable": 0.0
            },
            "delta_chamfer_vs_carrier": -0.0002629753671594681,
            "delta_fscore_vs_carrier": 0.0013959382367065287,
            "joint_score": -0.00037465042609599044,
            "on_pareto_front": true
          }
        }
      },
      "a75_loo_observation_threshold_router": {
        "ranker": "a75_loo_observation_threshold_router",
        "selected_count": 3,
        "nonzero_count": 3,
        "pareto_selected_count": 2,
        "mean_delta_chamfer_10case": -0.00017792855809090625,
        "mean_delta_fscore_10case": 0.0012369321731362294,
        "mean_joint_score_10case": -0.0002768831319418046,
        "gap_to_a73_oracle_joint": 3.198251314773156e-05,
        "gap_to_a53_reference_joint": 0.00010796709841984198,
        "selected_candidates": {
          "gso_000_input4": {
            "candidate": "scalar_1.250",
            "target_label": "scalar_1.25",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0004915772919945327,
            "delta_fscore_vs_carrier": -0.00437328029277656,
            "joint_score": -0.00014171486857240788,
            "on_pareto_front": true
          },
          "gso_002_input4": {
            "candidate": "scalar_1.250",
            "target_label": "scalar_1.25",
            "lambdas": {
              "surface_improved": 1.25,
              "surface_conflict": 1.25,
              "surface_neutral": 1.25,
              "unobserved_closable": 1.25
            },
            "delta_chamfer_vs_carrier": -0.0013525748505217317,
            "delta_fscore_vs_carrier": 0.015246453821315398,
            "joint_score": -0.0025722911562269636,
            "on_pareto_front": true
          },
          "gso_008_input4": {
            "candidate": "scalar_1.000",
            "target_label": "hard_lambda_1",
            "lambdas": {
              "surface_improved": 1.0,
              "surface_conflict": 1.0,
              "surface_neutral": 1.0,
              "unobserved_closable": 1.0
            },
            "delta_chamfer_vs_carrier": 6.486656160720194e-05,
            "delta_fscore_vs_carrier": 0.0014961482028234552,
            "joint_score": -5.482529461867447e-05,
            "on_pareto_front": false
          }
        }
      }
    },
    "best_no_gt_ranker_by_joint": "a75_observation_diagnostic_prior",
    "best_no_gt_joint_score_10case": -0.00030886564508953617,
    "best_no_gt_gap_to_a73_oracle_joint": 0.0,
    "a75_diagnostic_matches_oracle_cases": 3,
    "a75_conservative_matches_oracle_cases": 2,
    "a75_loo_matches_oracle_cases": 2,
    "a74_loo_joint_score_10case": -5.044815542462158e-05,
    "a73_oracle_joint_score_10case": -0.00030886564508953617,
    "a73_weak_proxy_joint_score_10case": -2.9567720136235098e-05,
    "a73_hard_joint_score_10case": -0.00015062746964978867,
    "a53_reference_joint_score_10case": -0.0003848502303616466,
    "recommended_next_signal": "Observation-conditioned state can explain why gso002 prefers scalar overstep and gso008 prefers conflict-only, but LOO threshold routing remains underdetermined with only three active cases. The next step should materialize more active cases or move this observation state into sampler-time regional guidance."
  },
  "case_summaries": [
    {
      "case_id": "gso_000_input4",
      "observation": {
        "case_id": "gso_000_input4",
        "best_mvd_iter": 3,
        "best_mvd_delta": -5.641310541906058e-05,
        "best_mvd_local_damage": true,
        "best_mvd_all_view_nonworse": false,
        "best_mvd_conflict_abs_delta": -0.00017237412604031305,
        "best_mvd_visible_abs_delta": 0.0004229204812056034,
        "best_mvd_region_spread": 0.00023085900521989923,
        "all_view_first_iter": null,
        "all_view_last_iter": null,
        "late_safe_signal": false,
        "late_safe_iter": null,
        "early_mv_paradox_damage": false,
        "early_paradox_iter": null,
        "damage_ratio": 0.75,
        "mvd_improve_count": 3,
        "damage_given_mvd_improve_ratio": 1.0,
        "mid_observation_gain": true,
        "observation_state": "mid_mv_gain_without_late_safety"
      },
      "diagnostic_target": "scalar_1.25",
      "conservative_target": "hard_lambda_1",
      "diagnostic_candidate": "scalar_1.250",
      "conservative_candidate": "scalar_1.000",
      "loo_candidate": "scalar_1.250",
      "oracle_candidate": "scalar_1.250",
      "diagnostic_matches_oracle": true,
      "conservative_matches_oracle": false,
      "loo_matches_oracle": true
    },
    {
      "case_id": "gso_002_input4",
      "observation": {
        "case_id": "gso_002_input4",
        "best_mvd_iter": 4,
        "best_mvd_delta": -0.0012259286206140474,
        "best_mvd_local_damage": true,
        "best_mvd_all_view_nonworse": true,
        "best_mvd_conflict_abs_delta": 0.0004285256250320807,
        "best_mvd_visible_abs_delta": 0.0011254426449226057,
        "best_mvd_region_spread": 0.0016431048459693432,
        "all_view_first_iter": 2,
        "all_view_last_iter": 8,
        "late_safe_signal": true,
        "late_safe_iter": 8,
        "early_mv_paradox_damage": true,
        "early_paradox_iter": 2,
        "damage_ratio": 0.75,
        "mvd_improve_count": 8,
        "damage_given_mvd_improve_ratio": 0.75,
        "mid_observation_gain": true,
        "observation_state": "late_safe_global_gain"
      },
      "diagnostic_target": "scalar_1.25",
      "conservative_target": "scalar_1.25",
      "diagnostic_candidate": "scalar_1.250",
      "conservative_candidate": "scalar_1.250",
      "loo_candidate": "scalar_1.250",
      "oracle_candidate": "scalar_1.250",
      "diagnostic_matches_oracle": true,
      "conservative_matches_oracle": true,
      "loo_matches_oracle": true
    },
    {
      "case_id": "gso_008_input4",
      "observation": {
        "case_id": "gso_008_input4",
        "best_mvd_iter": 2,
        "best_mvd_delta": -0.0004980929098730019,
        "best_mvd_local_damage": true,
        "best_mvd_all_view_nonworse": false,
        "best_mvd_conflict_abs_delta": 0.0013316666301232058,
        "best_mvd_visible_abs_delta": -0.0007004858158546623,
        "best_mvd_region_spread": 0.0007308972402348546,
        "all_view_first_iter": 1,
        "all_view_last_iter": 1,
        "late_safe_signal": false,
        "late_safe_iter": null,
        "early_mv_paradox_damage": true,
        "early_paradox_iter": 1,
        "damage_ratio": 1.0,
        "mvd_improve_count": 5,
        "damage_given_mvd_improve_ratio": 1.0,
        "mid_observation_gain": false,
        "observation_state": "early_mv_gain_local_damage"
      },
      "diagnostic_target": "conflict_0.75",
      "conservative_target": "conflict_0.75",
      "diagnostic_candidate": "probe_v0.000_c0.750_r0.000",
      "conservative_candidate": "probe_v0.000_c0.750_r0.000",
      "loo_candidate": "scalar_1.000",
      "oracle_candidate": "probe_v0.000_c0.750_r0.000",
      "diagnostic_matches_oracle": true,
      "conservative_matches_oracle": true,
      "loo_matches_oracle": false
    }
  ],
  "loo_details": [
    {
      "heldout_case": "gso_000_input4",
      "train_cases": [
        "gso_002_input4",
        "gso_008_input4"
      ],
      "train_mean_joint": -0.001473470791161477,
      "train_selected_candidates": {
        "gso_002_input4": "scalar_1.250",
        "gso_008_input4": "probe_v0.000_c0.750_r0.000"
      },
      "params": {
        "use_late": false,
        "use_paradox": false,
        "use_mid": true,
        "late_target": "scalar_1.25",
        "paradox_target": "conflict_0.75",
        "mid_target": "scalar_1.25",
        "default_target": "conflict_0.75",
        "early_iter_max": 1,
        "mid_iter_min": 2
      },
      "heldout_observation_state": "mid_mv_gain_without_late_safety",
      "heldout_target": "scalar_1.25",
      "heldout_selected_candidate": "scalar_1.250",
      "heldout_delta_chamfer": -0.0004915772919945327,
      "heldout_delta_fscore": -0.00437328029277656,
      "heldout_joint": -0.00014171486857240788,
      "heldout_on_pareto_front": true
    },
    {
      "heldout_case": "gso_002_input4",
      "train_cases": [
        "gso_000_input4",
        "gso_008_input4"
      ],
      "train_mean_joint": -0.0002581826473341992,
      "train_selected_candidates": {
        "gso_000_input4": "scalar_1.250",
        "gso_008_input4": "probe_v0.000_c0.750_r0.000"
      },
      "params": {
        "use_late": false,
        "use_paradox": false,
        "use_mid": true,
        "late_target": "scalar_1.25",
        "paradox_target": "conflict_0.75",
        "mid_target": "scalar_1.25",
        "default_target": "conflict_0.75",
        "early_iter_max": 1,
        "mid_iter_min": 2
      },
      "heldout_observation_state": "late_safe_global_gain",
      "heldout_target": "scalar_1.25",
      "heldout_selected_candidate": "scalar_1.250",
      "heldout_delta_chamfer": -0.0013525748505217317,
      "heldout_delta_fscore": 0.015246453821315398,
      "heldout_joint": -0.0025722911562269636,
      "heldout_on_pareto_front": true
    },
    {
      "heldout_case": "gso_008_input4",
      "train_cases": [
        "gso_000_input4",
        "gso_002_input4"
      ],
      "train_mean_joint": -0.0013570030123996857,
      "train_selected_candidates": {
        "gso_000_input4": "scalar_1.250",
        "gso_002_input4": "scalar_1.250"
      },
      "params": {
        "use_late": false,
        "use_paradox": false,
        "use_mid": true,
        "late_target": "scalar_1.25",
        "paradox_target": "conflict_0.75",
        "mid_target": "scalar_1.25",
        "default_target": "hard_lambda_1",
        "early_iter_max": 1,
        "mid_iter_min": 2
      },
      "heldout_observation_state": "early_mv_gain_local_damage",
      "heldout_target": "hard_lambda_1",
      "heldout_selected_candidate": "scalar_1.000",
      "heldout_delta_chamfer": 6.486656160720194e-05,
      "heldout_delta_fscore": 0.0014961482028234552,
      "heldout_joint": -5.482529461867447e-05,
      "heldout_on_pareto_front": false
    }
  ],
  "conclusion": "Observation-conditioned descriptors are informative and can reproduce the A73 oracle under an all-case diagnostic prior, but leave-one-case-out routing is still unstable because there are only three active cases and no candidate-specific observation residuals."
}