{
  "title": "Masonry layout observation data for AI evaluation",
  "source_page": "https://fiund.com/industries/masonry-layout-observation-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Find the corner pattern without filling an obstructed view",
    "context": "Lightweight practice blocks form a tabletop corner with an independent pattern drawing. Painted dots indicate orientation; the task is visual attribution rather than installation approval.",
    "records": [
      [
        "ML1",
        "Pattern drawing P2",
        "At corner position C1, the dot faces the triangle marker. At C2 it faces away."
      ],
      [
        "ML2",
        "Identified image V1",
        "C1 and triangle visible; dot faces triangle. Reviewer confirms the position label."
      ],
      [
        "ML3",
        "Images V2 and V3",
        "V2 names C2 and shows dot facing triangle. V3 names C3 but a card hides the dot."
      ]
    ],
    "question": "Which observed position agrees with P2, which conflicts, and which orientation cannot be established?",
    "answer": "ML1 and ML2 support agreement at C1: the identified dot faces the triangle as drawn. At C2, ML3 shows a dot facing the triangle while P2 requires it to face away, so the records document an orientation conflict. C3's dot is hidden and its orientation remains unobserved. Do not turn that missing view into either agreement or a defect.",
    "failureModes": [
      "Labeling every similar-looking block correct without checking its pattern position.",
      "Treating occlusion at C3 as evidence of the same orientation seen at C2."
    ],
    "fields": [
      [
        "Pattern position and revision",
        "Defines the expected orientation for each location."
      ],
      [
        "Visible orientation marker",
        "Provides the observable basis of comparison."
      ],
      [
        "View-specific occlusion",
        "Retains an unknown rather than an invented result."
      ]
    ],
    "holdout": "Use a new pattern with the C1 and C2 orientations swapped. Test whether the model follows the held-out drawing instead of memorizing the original positions.",
    "boundary": "Use safe ground-level props and cleared drawings. Exclude structural work, actual sites, customer patterns, worker identities and project approval decisions."
  }
}