{
  "c3-e3": [
    {
      "parts": [
        "web-checks"
      ],
      "reason": "Lecture requests bearing/web-buckling follow-up but supplies no stiff-bearing/contact dimensions or local flange-restraint detail. Numerical local capacities cannot be certified.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "t3-q5": [
    {
      "parts": [
        "checks"
      ],
      "reason": "Selected section passes demonstrated member and serviceability checks; support/point-load contact lengths and local web-restraint inputs are absent, preventing complete bearing/local-web design.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "a1-q1": [
    {
      "parts": [
        "b"
      ],
      "reason": "Completed annotated teaching SVG provided. Assignment-specific screenshots of a student's full AI interaction history are not supplied and cannot be fabricated; illustrative prompts are not historical evidence.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "a1-q2": [
    {
      "parts": [
        "iii"
      ],
      "reason": "Main plate's two end distances within the110 mm cross-joint bolt spacing are not separately dimensioned. Numerical check explicitly assumes a centered butt. Edge preparation also determines whether40 mm transverse edges meet detailing limits.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "a1-q3": [
    {
      "parts": [
        "size"
      ],
      "reason": "Strength requires at least4.416721 mm leg and5 mm passes the line-weld check, but plate/column-flange thicknesses needed for minimum/maximum weld-size detailing are absent.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "a2-q2": [
    {
      "parts": [
        "c",
        "d"
      ],
      "reason": "LTB computations assume normal loading and effective length equal to restraint spacing. The assignment does not state enough end-restraint/load-height detail to verify those assumptions unconditionally.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "c2-e6": [
    {
      "parts": [
        "weld-strength",
        "lengths"
      ],
      "reason": "The 6 mm strength selection is limited by the 8 mm angle edge. Supporting-plate thickness is absent, so the thicker-part minimum weld size is not verifiable.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "c2-e7": [
    {
      "parts": [
        "size"
      ],
      "reason": "Plate/support thicknesses are absent. The lecturer\u2019s 6 mm fillet passes line-weld strength, but minimum/maximum permitted leg cannot be certified.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "c2-e8": [
    {
      "parts": [
        "detailing"
      ],
      "reason": "Supporting-column thickness is absent. The 6 mm web fillet passes strength but may not meet the thicker-part minimum if the supporting flange exceeds 19 mm.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "c2-e9": [
    {
      "parts": [
        "lengths"
      ],
      "reason": "Supporting-plate thickness is absent. The 4 mm strength selection satisfies the 6 mm angle edge maximum, but its thicker-part minimum remains conditional.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "t2-q4": [
    {
      "parts": [
        "interaction"
      ],
      "reason": "Gauge/supporting-flange dimensions are insufficient to establish the course no-prying condition. The stated approximate bolt shear/tension calculation passes conditionally.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "t2-q7": [
    {
      "parts": [
        "web-weld"
      ],
      "reason": "Supporting-column flange thickness is missing. A 6 mm web weld requires the thicker part to be at most 19 mm; above that, the source minimum conflicts with the web-edge maximum.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2023-b2-bii": [
    {
      "parts": [],
      "reason": "The no-prying condition requires a bolt gauge absent from the paper; the worked nominal-tension answer states the limiting gauge instead of inventing it.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2023-b4-b": [
    {
      "parts": [],
      "reason": "The numerical LTB answer assumes normal loading and effective length equal to the stated restraint spacing. The paper does not fully specify load-height/end-restraint applicability.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2023-b4-c": [
    {
      "parts": [],
      "reason": "The added-midpoint-restraint LTB answer assumes normal loading and effective length equal to restraint spacing; the needed load-height/end-restraint conditions are not fully stated.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2024-b2-b": [
    {
      "parts": [],
      "reason": "The eccentric weld strength answer requires at least 7.729805 mm leg; the 8 mm selection remains conditional because plate/support thicknesses for detailing are absent.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2024-b3-c": [
    {
      "parts": [],
      "reason": "The source provides effective height and moment amplification but does not explicitly classify the frame. The member solution states a non-sway assumption that cannot be independently established from the schedule.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2024-b4-c": [
    {
      "parts": [],
      "reason": "The segment BC LTB calculation assumes normal loading and effective length equal to restraint spacing; the full load-height/end-restraint conditions are not stated.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "exam-2024-b4-d": [
    {
      "parts": [],
      "reason": "The segment CD LTB calculation assumes normal loading and effective length equal to restraint spacing; the full load-height/end-restraint conditions are not stated.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "t3-q2": [
    {
      "parts": [
        "loads",
        "b1",
        "b2",
        "b3",
        "bearing",
        "web-buckling"
      ],
      "reason": "The question omits concrete unit weight and gravitational acceleration. Symbolic load equations are provided; numerical results are explicitly an illustrative gamma=24, g=9.81 scenario, not unqualified source data.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ],
  "t3-q3": [
    {
      "parts": [
        "b2",
        "b3"
      ],
      "reason": "This question inherits Q2 loading, whose concrete unit weight and gravitational acceleration are unstated. Numerical LTB demands remain conditional on the declared illustrative constants; the general load equations are provided.",
      "supplementary_source_status": "User confirmed no supplementary information is available; retain conditional answer and incomplete status."
    }
  ]
}