{
 "manifest": {
  "id": "p2_41_khufu_passes",
  "title": "What survives a change of pass across Khufu",
  "date": "2026-10-03",
  "started_utc": "2026-10-03T12:37:39+00:00",
  "runtime_s": 0.2,
  "commit": "f2ed0e0",
  "params": {
   "runs": {
    "2022": "p2_16_khufu_volume",
    "2025": "lab_khufu_2025"
   },
   "run_commits": {
    "2022": "d8a0060",
    "2025": "c50a62f+"
   },
   "cycle_m": 6.17,
   "shuffles": 1000,
   "test": "p2_21_what_survives.compare"
  },
  "environment": {
   "python": "3.11.3",
   "numpy": "2.4.6",
   "numba": "0.67.0",
   "threads": 16,
   "cpus": 16
  }
 },
 "supports": [
  1,
  4
 ],
 "results": {
  "p1": {
   "passes": {
    "positions": 9595,
    "passing": [
     1355,
     593
    ],
    "both": 83,
    "chance_both": 83.743095,
    "ratio": 0.991126,
    "same_depth_share": 0.240964,
    "same_depth_chance": 0.187096,
    "same_depth_chance_p95": 0.253012
   },
   "copies": {
    "positions": 9595,
    "passing": [
     660,
     419
    ],
    "both": 35,
    "chance_both": 28.821261,
    "ratio": 1.214381,
    "same_depth_share": 0.485714,
    "same_depth_chance": 0.216714,
    "same_depth_chance_p95": 0.314286
   },
   "2022_vs_copy": {
    "positions": 9595,
    "passing": [
     1355,
     660
    ],
    "both": 157,
    "chance_both": 93.204794,
    "ratio": 1.684463,
    "same_depth_share": 0.452229,
    "same_depth_chance": 0.199433,
    "same_depth_chance_p95": 0.254777
   },
   "2025_vs_copy": {
    "positions": 9595,
    "passing": [
     593,
     419
    ],
    "both": 30,
    "chance_both": 25.895466,
    "ratio": 1.158504,
    "same_depth_share": 0.233333,
    "same_depth_chance": 0.208267,
    "same_depth_chance_p95": 0.333333
   }
  },
  "p4": {
   "passes": {
    "positions": 9595,
    "passing": [
     4,
     0
    ],
    "both": 0,
    "chance_both": 0.0,
    "ratio": null,
    "same_depth_share": null,
    "same_depth_chance": null,
    "same_depth_chance_p95": null
   },
   "copies": {
    "positions": 9595,
    "passing": [
     4,
     0
    ],
    "both": 0,
    "chance_both": 0.0,
    "ratio": null,
    "same_depth_share": null,
    "same_depth_chance": null,
    "same_depth_chance_p95": null
   },
   "2022_vs_copy": {
    "positions": 9595,
    "passing": [
     4,
     4
    ],
    "both": 0,
    "chance_both": 0.001668,
    "ratio": 0.0,
    "same_depth_share": null,
    "same_depth_chance": null,
    "same_depth_chance_p95": null
   },
   "2025_vs_copy": {
    "positions": 9595,
    "passing": [
     0,
     0
    ],
    "both": 0,
    "chance_both": 0.0,
    "ratio": null,
    "same_depth_share": null,
    "same_depth_chance": null,
    "same_depth_chance_p95": null
   }
  }
 },
 "overlap_excess_sd": -0.081203,
 "agree_positions": {
  "1": 83,
  "4": 0
 },
 "finding": "Across Khufu, of 9,595 positions on the same lines the 2022 pass passes 1,355 at a support of one and the 2025 pass 593; 83 pass in both, 0.99 times chance, and at 24% of those the best depths agree within half a cycle, within what random pairings give (19%, up to 25%). The two motionless copies, with nothing moving and nothing inside, share positions at 1.21 times chance; the 2022 image and its own copy at 1.68 times. Across the two passes they agree no more than chance allows."
}