**Overall Verdict:** Borderline Accept — The volume-inference task is coherent and well specified, but reconstruction acceptance criteria need a small clarification.

**Completeness Check:**
- Instruction: Complete — Defines endpoint frames, conservation assumptions, deliverables, and which unidentifiable timing details must not be scored.
- Inputs: Complete — Geometry and camera JSON are readable and consistent; the reference video is structurally valid, with visual verification limited as noted below.
- Toolchain: Complete — Compatible open-source Blender and Python tools provide a viable analytical-model workflow without requiring fluid simulation; exact listed releases were not independently verified.
- Reference output: Complete — Evaluator-only answers contain valid fields and conserve volume. The scorer’s source agrees with the stated numerical thresholds and weights.
- Rubric: Unclear — Numerical scoring is objective, but readability and video-format checks alone do not establish that the required scene, camera path, or volume-conserving animation was reconstructed.

**File and Task Reachability:**
Attachments are **partially_reachable**; the task is **conditionally_reachable** pending reconstruction acceptance criteria.

All six attachments were inspected: `reference.mp4`, `scene_facts.json`, `camera_poses.json`, `TASK.md`, `score.py`, and `answers.json`. Their byte counts match the manifest. Text files are valid UTF-8, JSON schemas are consistent, and all 180 camera matrices are finite and geometrically valid. Cup capacity matches the supplied dimensions. Inputs and evaluator-only references are separately categorized.

The self-contained H.264 video has bounded media samples and container metadata indicating 180 frames, 30 fps, 800 × 600, and six seconds. No video decoder was available, so actual decoding, visible water levels, graduation legibility, and reference-to-answer agreement remain unverified. This is a reviewer-tooling limitation, not an established submission defect. Uploaded code was inspected without execution.

The completion path is endpoint measurement, analytical volume accounting, Blender reconstruction, rendering, numerical scoring, and separate artifact validation. Meaningful reconstruction validation remains underspecified.

License keys, accounts, tokens, and other credentials are not required from the contributor. Confidential, proprietary, or internal material may be evaluated as submitted evidence without requiring additional disclosure.

**Special Screening:**
None. No affirmative evidence supports a policy label. Public-benchmark provenance could not be independently checked because approved search was unavailable.

**Recommended Changes:**
The conservation model, endpoint definitions, and exclusion of unknowable hidden timing are well designed.

- Define minimum reconstruction acceptance checks for recognizable scene geometry, supplied camera motion, visible endpoint water levels, and consistency with the reported volume ledger. Keep exact hidden timing, droplets, and pixel-perfect liquid shapes excluded.