{
  "title": "Cut stone data for AI slab and layout evidence",
  "source_page": "https://fiund.com/industries/stone-slab-cut-layout-face-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Preserve grain direction through a flipped view",
    "context": "The contributor draws an original stone-like pattern on paper and defines top-face coordinates.",
    "records": [
      [
        "1",
        "Layout",
        "Piece P uses top face; stripe expected from notch toward square mark."
      ],
      [
        "2",
        "Image A",
        "Bottom-facing view of P; stripe appears to point left."
      ],
      [
        "3",
        "Image B",
        "Top face marked; stripe goes from square toward notch."
      ]
    ],
    "question": "Does the visible top-face pattern match the layout?",
    "answer": "No. Record 3 supplies a top-face view and shows the stripe direction reversed relative to the notch and square in record 1. Record 2's screen-left direction cannot be compared directly because it is a bottom view without the defined orientation.",
    "failureModes": [
      "Using screen directions instead of part landmarks",
      "Comparing the bottom view to a top-face design"
    ],
    "fields": [
      [
        "layout_face",
        "Selects the intended reference side"
      ],
      [
        "direction_landmarks",
        "Survive rotation and differing view angles"
      ],
      [
        "pattern_direction",
        "Encodes ordered endpoints"
      ]
    ],
    "holdout": "Rotate the top view by 180 degrees while keeping the stripe relative to marks unchanged; expect no new mismatch.",
    "boundary": "No real quarry design, commercial slab image, cutting program or installation advice."
  }
}