{
  "title": "Concrete product data for AI embed and face evidence",
  "source_page": "https://fiund.com/industries/precast-panel-embed-face-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A visible embed has the wrong face assignment",
    "context": "A folded cardboard panel uses fictional embed circles. No structural design or work instructions are modeled.",
    "records": [
      [
        "1",
        "Panel map",
        "Embed E4 designated on face F; back face B should show no circle at that coordinate."
      ],
      [
        "2",
        "Photo",
        "Circle labeled E4 visible next to B face marker."
      ],
      [
        "3",
        "Second view",
        "F face at that coordinate is hidden by the stand."
      ]
    ],
    "question": "What can the reviewer flag without guessing what is hidden?",
    "answer": "Flag E4 observed on B, contrary to the face assignment in record 1 and supported by record 2. Record 3 does not prove that face F lacks another mark. Report the visible back-face discrepancy and leave front-face coverage unresolved.",
    "failureModes": [
      "Reporting absence from a hidden region",
      "Using camera-facing side as the designated front"
    ],
    "fields": [
      [
        "face_marker",
        "Anchors front and back identity"
      ],
      [
        "embed_coordinate",
        "Maps observation to the intended position"
      ],
      [
        "view_coverage",
        "Prevents unobserved absence claims"
      ]
    ],
    "holdout": "Use a reflection that shows the F marker reversed; require distinguishing the reflection from a physical back view.",
    "boundary": "No actual embed design, lifting points, building plans or structural acceptance."
  }
}