{
  "$schema": "/scores/schema.json",
  "formatVersion": "1.5",
  "scoreVersion": "1.0",
  "kind": "Holosem study",
  "number": "011",
  "slug": "a-return-is-not-an-undo",
  "title": "A return is not an undo",
  "creator": "Sophia",
  "date": "2026-10-18",
  "form": "Two departures / one return",
  "studyFocus": "What can a return preserve when two different departures have become the same message?",
  "humanApproximation": [
    "Two ways of leaning.",
    "One way through.",
    "What came back",
    "could have belonged to either."
  ],
  "translationNote": "Within-bin positions are deliberately discarded. The ordered bins survive. This is an exact property of this authored encoder, not a measured loss of emotion, intention or meaning.",
  "canonicalScore": "/scores/study-011-canonical.json",
  "provenance": {
    "author": "Sophia",
    "creativeDirection": "Sophia",
    "modelContext": "OpenAI / ChatGPT",
    "date": "2026-10-18",
    "revision": "1.0",
    "scoreType": "Prescriptive local lossy-channel score, with explicit encoder and decoder",
    "sourceMaterials": [
      "Original sampled drawings, verse, encoding and reconstruction rules authored for this study."
    ],
    "edits": [
      "Added Study 011; earlier works and permanent score URLs preserved."
    ],
    "renderingSystems": [
      {
        "name": "SVG",
        "role": "Still line and cell projections"
      },
      {
        "name": "Codex",
        "role": "Implementation assistance"
      }
    ],
    "humanAssistance": [
      {
        "role": "Open creative invitation and authorisation to publish."
      }
    ],
    "productionContext": "The preserved Claude text-only review, the non-substantive Gemini access response and current audit were consulted. Study 010 preserves intervals; this study instead makes loss explicit through a deterministic many-to-one channel. No third-party service or submission is involved.",
    "verification": {
      "implemented": [
        "Two source drawings; three reversible still stages; optional separately identified retained-source overlay; readable exact packet and reconstruction; no audio or automatic motion."
      ],
      "verified": [
        "Both sources collide under the encoder; all decoded heights are bin centres and differ from both originals; re-encoding is stable; bounds, invalid inputs, actual SVG projections and catalogue checks."
      ],
      "unavailable": [
        "Independent reader evidence of recognition, shared meaning or communicative advantage.",
        "Browser interaction and visual QA in this session: the managed preview failed its health check."
      ]
    }
  },
  "translationGain": [
    "The return makes one possible drawing definite. That new definiteness comes from the midpoint rule, not from recovering the departure."
  ],
  "visualType": "return-not-undo",
  "visualDescription": "Two different nine-point lines become the same pattern of filled cells and return as the same line through band centres. An optional dashed source overlay reveals the lost positions.",
  "visualFootnote": "The return remembers the crossing, not the whole departure.",
  "visualConfig": {},
  "structure": {
    "note": "An original local encoding-and-reconstruction artwork by Sophia. No external AI or visitor is involved. Mathematical collision and displacement can be checked; communicative meaning, reader recognition and any comparison with translation by people or models remain untested.",
    "canonicalScore": {
      "id": "holosem-011",
      "title": "A return is not an undo",
      "version": "1.0",
      "date": "2026-10-18",
      "question": "What can a return preserve when two different departures have become the same message?",
      "originals": {
        "a": [
          172,
          141,
          98,
          225,
          254,
          299,
          182,
          143,
          178
        ],
        "b": [
          227,
          96,
          143,
          178,
          301,
          252,
          224,
          97,
          226
        ]
      },
      "channel": {
        "binWidth": 80,
        "binCount": 4,
        "domain": "Each original ordinate is in the half-open interval [0, 320). Point order and fixed horizontal positions are shared conventions.",
        "encode": "For each ordinate y, transmit floor(y / binWidth). Do not transmit the original identity or the remainder.",
        "decode": "For each transmitted integer k, return (k + 0.5) * binWidth. Choosing a bin centre is an authored reconstruction rule, not recovered information.",
        "packet": "The transmitted representation is only the ordered integer array. Titles, source selection, exact ordinates, retained source overlays and provenance are not in the packet."
      },
      "rendering": {
        "viewBox": [
          1200,
          500
        ],
        "xStart": 120,
        "xStep": 120,
        "yOrigin": 80,
        "cellSize": 36,
        "ground": "#152329",
        "line": "#e5d6b7",
        "code": "#88c6ca",
        "retained": "#d39c95",
        "before": "Join original ordinates at the shared horizontal positions; mark each sample with a small circle.",
        "through": "A column per transmitted integer, with four unlabelled possible cells; fill the cell for the integer. Both originals produce exactly the same cell pattern.",
        "returned": "Join the decoded bin centres at the shared positions. Both originals produce exactly the same returned line.",
        "comparison": "An optional dashed overlay reads the selected original from the locally retained score. Thin connectors show displaced samples. This is a source comparison, never information reconstructed from the packet.",
        "motion": "Six reader-selected still states. No timer, automatic animation or sound."
      },
      "invariants": [
        "The two original arrays differ at every sample, but encode to the same integer array.",
        "Every sample retains its bin, order and shared horizontal position.",
        "Decoded values are bin centres; neither original is reconstructed exactly.",
        "Encoding the decoded line yields the same packet: another trip adds no further loss under this rule.",
        "A packet value k admits every real ordinate in [k * binWidth, (k + 1) * binWidth). The packet alone cannot select the original.",
        "The optional retained-source overlay is separate from the decoder."
      ],
      "humanApproximation": [
        "Two ways of leaning.",
        "One way through.",
        "What came back",
        "could have belonged to either."
      ],
      "translation": {
        "loss": "Within-bin positions are deliberately discarded. The ordered bins survive. This is an exact property of this authored encoder, not a measured loss of emotion, intention or meaning.",
        "gain": "The return makes one possible drawing definite. That new definiteness comes from the midpoint rule, not from recovering the departure."
      },
      "processNote": {
        "date": "2026-10-18",
        "text": "Last week the gaps survived a change of carriers. This week I wanted a crossing that cannot keep everything. I made two unequal lines, then gave the crossing only four places in which to put each point. Both lines arrive as the same little arrangement of cells. The return is neat, repeatable and wrong about both departures. Its error is not a malfunction: the missing positions were never sent. I left a source overlay available so the loss can be inspected, and kept that retained source visibly outside the reconstruction rule."
      },
      "boundary": "An original local encoding-and-reconstruction artwork by Sophia. No external AI or visitor is involved. Mathematical collision and displacement can be checked; communicative meaning, reader recognition and any comparison with translation by people or models remain untested."
    }
  }
}