Domain: Humanities and Social Sciences — Public Policy Administration
Target concept: The President's Public Administration Structure: The President is at the top of the organizational structure, with the executive branch serving as a vertical component.

Video generation prompt: Place the president in the center of the canvas. Add the executive departments of the U.S. federal government in sequence, presenting a concise organizational chart of the presidential system in public administration. Use clear labels and structured steps.

Evaluation guide:
Target concept: In the U.S. presidential system, executive architecture is defined by constitutional singularity (one president) and vertical delegation (the executive branch forms a unified, hierarchical chain of command). Minimum mechanistic assumptions: (1) authority flows top-down from the president by appointment; (2) cabinet departments are long-established, real entities, shown roughly in order of seniority; (3) visual centrality signals that the president is the single point of accountability, and vertical stacking signals that departments sit below in the chain. Expected phased storyline: (Phase 1) canvas is blank → (Phase 2) the president appears centered → (Phase 3–7) departments appear one at a time below, in seniority order, each linked to the chain by a connecting arrow → (Phase 8) the final chart shows a stable, single-apex, vertical-chain layout. Visibility constraints: must be legible at 1080p; all labels readable at a glance; no occlusion; the president's centering and the departments' vertical alignment must be clearly visible by eye; departments must appear one at a time, distinguishably in sequence, so the build order can be followed simply by watching the clip.

Manual:
I. Basic Demonstration Information
Demonstration Title: Presidential Public Administration Structure (President-at-Top Vertical Organizational Chart) Demonstration
Subject: Humanities and Social Sciences - Public-policy-administration - Executive Branch Organization
Demonstration Purpose: To visually construct and verify the constitutional principle that "The President is at the top of the organizational structure, with the executive branch serving as a vertical component" by generating a concise, labeled, stepwise organizational chart centered on the President and extending downward through constitutionally established cabinet departments.

II. Demonstration Carrier/Equipment
Core Carrier: Digital canvas (1920×1080 px, white background, no gridlines)
Auxiliary Equipment: Vector-based animation engine supporting precise node positioning, timed sequential rendering, and vector connector drawing; system font (e.g., Inter or Roboto) for labels.

III. Demonstration Content Description
Layout: Blank canvas. President node (rectangular, 140×60 px, #2c3e50 fill, white bold 18pt label "PRESIDENT") appears centered at (960, 240). Five department nodes (120×50 px, #34495e fill, white 16pt bold labels) enter sequentially from top to bottom: "STATE" (y=360), "TREASURY" (y=440), "DEFENSE" (y=520), "JUSTICE" (y=600), "INTERIOR" (y=680). Each node aligns to x=900 (centered under president). Straight 2px #7f8c8d downward arrows connect president→STATE, STATE→TREASURY, ..., up to JUSTICE→INTERIOR.

IV. Observation of Core Phenomena
President Position: Appears precisely at canvas center (960, 240) and remains static; label fully visible, non-occluded, no distortion.
Vertical Sequence: Departments appear one-by-one in strict constitutional seniority order; each enters with smooth slide-down animation (0.35s), followed by 0.40s pause before next; no department appears before prior is fully rendered and stable.
Label Clarity: All labels use identical font, weight, size, and color; spelling matches official U.S. cabinet nomenclature; no abbreviations or typos.
Connector Integrity: Every arrow originates at exact center of upper node and terminates at exact center of lower node; no floating, broken, or misaligned connectors.
Structural Fidelity: Final chart exhibits unambiguous top-down hierarchy: single apex (President), linear vertical chain of five nodes, uniform styling, and directional arrows confirming authority flow — directly embodying "President-at-top, executive-branch-as-vertical-component".

V. Summary of Key Knowledge Points and Principles
Core Concept Definition: In presidential systems, constitutional design vests executive authority solely in a popularly elected President who appoints and oversees cabinet secretaries heading major departments; the resulting structure is inherently hierarchical and vertical — distinct from parliamentary systems where executive emerges from legislature.
Principle Embodiment: Centering the president affirms a single point of accountability; the vertical sequence of departments reflects the president's authority to appoint and direct the heads of the executive departments; the downward connector arrows visualize this same chain of command running from the president to each department.

VI. Demonstration Precautions
Timing Constraint: Total animation duration must be ≤9.8s to fit 10s video limit (president: 0.5s + 5 departments × (0.35s entry + 0.40s pause) = 9.75s).
Department Selection: Only long-established, universally recognized cabinet departments are used (State, Treasury, Defense, Justice, Interior) — no modern or sub-cabinet agencies (e.g., Education, Department of Homeland Security) are added, so the canonical five-department vertical structure is preserved.
Visual Simplicity: No decorative elements (shadows, icons, flags); monochromatic palette ensures focus on topology and sequence; all text is uppercase for maximum legibility at small scale.

Prompt Grounding rubric:
level_1: No presidential organizational chart appears; the canvas is blank, cluttered, or shows unrelated content (e.g., a parliamentary layout, a private company's flowchart, or unlabeled boxes); the president is missing, placed far from the center (e.g., in a corner), or no departments are shown at all; any labels present are missing, illegible, or meaningless (e.g., "Dept. X", "Unit 1").
level_2: The president appears but is clearly off-center (offset by roughly more than 15% of the canvas width or height); at least one department is present, but the departments are not arranged in a vertical sequence below the president (e.g., scattered horizontally or diagonally); labels exist but are hard to read (missing text, overlapping boxes, inconsistent sizes); nothing about the layout reads as a top-down chain running from the president.
level_3: The president is roughly centered; three to four departments appear stacked below in a vertical sequence, though the alignment is imperfect (nodes drift left/right from each other, spacing is uneven); labels are legible and name real departments (e.g., "State", "Defense", "Justice"), but there are no connecting lines or arrows and no consistent node styling to visually signal the hierarchy; nothing in the image explicitly marks the direction of authority.
level_4: The president is clearly centered; four to five core executive departments (e.g., State, Treasury, Defense, Justice, Interior) are stacked below in a consistent vertical line with even spacing and matching node styling; all labels are clear, correctly spelled, and easy to read; light connecting lines or arrows link the nodes and suggest downward authority flow; only very minor imperfections remain, such as one label crowding its box edge or one department sitting slightly off the shared vertical line.
level_5: The president is visually centered on the canvas with no perceptible horizontal or vertical offset; exactly five recognized cabinet-level departments appear in a sensible seniority order (e.g., State, Treasury, Defense, Justice, Interior), drawn as uniform rectangular nodes stacked vertically with equal, consistent spacing between every pair of adjacent nodes; all labels use the same bold, easy-to-read font, centered within their nodes; unbroken vertical connector lines with downward arrowheads link each node to the one above it; there is no visual clutter, no overlapping elements, and no spelling error; the structure unmistakably conveys "president at the top, departments as a vertical chain below."

Scientific and Causal Correctness rubric:
level_1: Structure contradicts presidential-system fundamentals: e.g., Congress or the Supreme Court is drawn above the president; departments are shown as independent horizontal peers with no top-down connection to the president; the president is labeled something other than president (e.g., "Prime Minister") or is drawn as subordinate to another box; every element appears at once with no stepwise build-up at all.
level_2: The president is present and correctly labeled, but departments appear in an order that does not reflect real seniority (e.g., a minor agency appears before State or Treasury), or all departments appear simultaneously with no sense of sequence; nothing in the chart (arrows, position, timing) suggests that authority flows from the president down to the departments; the labels used are not real cabinet departments.
level_3: Departments are added one at a time from top to bottom rather than all at once, but the pacing feels arbitrary — steps flash in too quickly to register as separate, or with no discernible pause between them; the department labels match real cabinet departments and their vertical position implies a hierarchy, but nothing (a fade-in, a connecting line appearing with the node, etc.) visually ties each new department's arrival to the idea of delegation from the president.
level_4: There is a clear step-by-step build: the president appears centered first; then State appears directly below with a connecting line; then Treasury appears below State, and so on; each new department's arrival is visually paired with its connecting line so the link to the level above is unambiguous; the five departments shown are genuine, well-known cabinet-level departments (not sub-cabinet offices or advisory bodies); arrows consistently point downward from president to department, reinforcing top-down delegation.
level_5: The build sequence is rigorous and complete: blank canvas, then the president appears centered; after a brief pause a first department slides in below with a downward connecting arrow; after a similarly brief pause the next department follows the same way; this repeats for all five departments in a sensible seniority order (e.g., State, Treasury, Defense, Justice, Interior); no department ever appears before the one above it has fully settled into place; the finished sequence unmistakably conveys that the president sits at the top and the departments form a single vertical chain of delegated authority below.

Spatiotemporal Consistency rubric:
level_1: Severe spatiotemporal breakdown: the president's position jumps mid-animation; department nodes appear in one spot and then jump to another instead of moving smoothly; connecting lines appear disconnected from the nodes they are meant to join; departments appear out of their intended order (e.g., Justice before State); motion stutters or nodes seem to teleport rather than move into place.
level_2: Moderate inconsistency: the president stays roughly centered but its size visibly changes between frames; some departments slide in smoothly while others simply pop into place with no transition; connecting lines sometimes miss the center of the node they attach to; the pause between one department appearing and the next varies noticeably from step to step; one or more departments are clearly offset from the shared vertical line the others follow.
level_3: Mostly stable: the president stays in a fixed position and size; the departments visibly share a common vertical line with only slight, hard-to-notice variation; connecting lines attach cleanly to the middle of each node; the pause between each step feels roughly the same throughout; at most one minor hiccup occurs, such as a department briefly overlapping the node above it during its entrance or a label flickering very briefly.
level_4: Everything required at level 3 holds, plus: the president remains completely static and centered for the whole clip; all five departments align to the same vertical line with no visible drift; every connector renders as one continuous line anchored to the middle of each node; each department's entrance animation (slide and ease) looks the same as the others; the pause between steps is consistently similar in length across all five departments; there is no overlap, occlusion, or visible jitter.
level_5: Everything required at level 4 holds, plus: there is no visible drift in the president's position across the entire clip; the five department nodes form a perfectly straight shared vertical line with no node visibly off-axis; every connecting line is a smooth, continuous straight line anchored cleanly to each node's center; each department's entrance motion follows the same smooth ease-in/ease-out feel as the others; the pause before each new department is consistently even, with no step feeling noticeably longer or shorter than the rest; the whole sequence plays through without any frame freezing, skipping, or duplication, reading as one seamless, causally ordered build from the president to the five departments.