Domain: Humanities and Social Sciences — Economics
Target concept: A pie chart is used to visually represent the market shares of a fully monopolized industry.

Video generation prompt: Draw a simple market share pie chart, labeling the market shares of each company (A, B, C, D, E), to illustrate Company A's complete monopoly in the market.

Evaluation guide:
Target concept: Full monopoly in economics is defined strictly as a single seller capturing 100% of market share -- no competitors supply substitutable goods/services. Minimum mechanistic assumption: Market share is a zero-sum proportional metric over a fixed total (100%), and pie charts encode proportion via angular area. Phased storyline: (1) Clean frame appears -> (2) Pie chart fades in as a solid blue circle labeled 'A: 100%' -> (3) Four barely visible peripheral annotations (B-E) appear with values <=0.1%, confirming statistical irrelevance -> (4) Title banner reinforces 'Fully Monopolized Market' -> (5) Static hold confirms permanence of structure. Visibility constraint: All verification must occur within the central 80% of the frame; no occlusion; text legibility requires >=14pt font at native resolution; verification of B-E's absence should be judged by whether they read as negligible tick-mark labels rather than colored wedge area -- not by trying to measure exact arc widths or detect rendering artifacts.

Manual:
I. Basic Demonstration Information
Demonstration Title: Pie Chart Representation of Full Market Monopoly (Company A = 100% Share)
Subject: Humanities and Social Sciences - Economics - Market Structures
Demonstration Purpose: To visually demonstrate that a fully monopolized industry is represented by a pie chart in which a single firm (Company A) accounts for 100% of market share — i.e., the entire circle — while competitors (B–E) hold zero effective market presence; to train recognition of visual encoding rules for economic concepts; and to distinguish monopolistic representation from oligopolistic or competitive charts.
II. Demonstration Carrier/Equipment
Core Carrier: Static 2D vector-based pie chart (no animation, no 3D, no gradients)
Auxiliary Equipment: Plain white background; high-contrast color scheme (A: solid cobalt blue #003366; B–E: near-invisible gray #f5f5f5 with 10% opacity); sans-serif font (Arial or Helvetica), 14pt minimum size; precise angular encoding (A = 360°, B–E = 0° filled area).
III. Demonstration Content Description
Layout: Chart centered in frame; diameter occupies 70% of horizontal resolution; title banner placed top-center (‘Fully Monopolized Market’); Company A label centered inside circle (‘A: 100%’); B–E labels placed radially outward at 0°, 90°, 180°, 270° positions, each with value ≤0.1% (e.g., ‘B: 0.03%’).
State Control: Chart remains static after full render; no animation, rotation, or interaction; all elements retain fixed position, size, color, and opacity for ≥6 seconds.
Comparison Baseline: Contrast is established implicitly — full-circle dominance of A vs. vanishingly thin peripheral annotations for B–E — eliminating any visual suggestion of meaningful competition.
IV. Observation of Core Phenomena
Company A Visual Dominance: Single unbroken circular region, uniformly filled, occupying entire chart area; no border, no separation lines, no gaps.
Companies B–E Visual Absence: No filled slices; only faint hairline tick marks or thin arcs at the chart perimeter, essentially imperceptible as colored area, paired with tiny numeric labels — functionally signaling 'statistical noise, not market presence'.
Label Clarity & Consistency: All labels use identical font, weight, and contrast; ‘100%’ is bolded; no abbreviations; no legend required due to direct labeling.
Stability & Fidelity: The chart holds a fixed position, size, and color scheme once rendered, with no flicker, no blur, and no visible drift in any element; aspect ratio is preserved throughout.
V. Summary of Key Knowledge Points and Principles
Core Concept Definition: Full monopoly occurs when a single firm supplies the entire market output with no close substitutes and insurmountable entry barriers — thus its market share is definitionally 100%.
Visual Encoding Principle: In economics visualization, a pie chart represents *relative share of a fixed whole*. Therefore, 100% share must occupy the *entire* pie — any visible slice assigned to another firm contradicts the definition of full monopoly.
Why Not Five Slices?: Showing five non-zero slices implies market division — i.e., oligopoly or monopolistic competition — violating the core condition of monopoly. Correct representation suppresses competitor slices *geometrically*, not just numerically.
VI. Demonstration Precautions
No 3D/Exploded Effects: These distort angular proportion and imply depth/layering, undermining share accuracy.
No Legend Required: Direct labeling eliminates ambiguity; legends introduce cognitive load and potential misreading.
No Animation Beyond Fade-In: Motion distracts from static conceptual truth; monopoly is a structural fact, not a process.
Verification Threshold: Human observers must identify A’s 100% dominance *within 2 seconds* of chart appearance — achieved only when A is the sole filled region and B–E are perceptually negligible.

Prompt Grounding rubric:
level_1: No pie chart appears anywhere in the frame; or a chart appears but doesn't carry labels for all five companies A-E; or Company A isn't labeled at all, or its slice looks the same size and color as another company's slice so it can't be picked out as dominant.
level_2: A pie chart with at least three of the five company labels is visible, but Company A's slice is not clearly the largest -- e.g. it looks equal to or smaller than 30% of the circle, or a label is placed on the wrong slice (e.g. 'A' tagging a sliver) -- and no share numbers are shown at all.
level_3: All five companies (A-E) are labeled on a pie chart, and A's slice is visibly the biggest, but it stops well short of the full circle (roughly 60-95%) with the remaining slices clearly large enough to read as ordinary competing shares; the chart doesn't yet include any explicit '100%' figure or other unambiguous full-share marker.
level_4: A pie chart shows all five labels; Company A's slice fills essentially the whole circle (>=98%) as one continuous colored disk; B-E are present only as very thin slivers (<=0.5% each), each carrying its own name and a small percentage figure; the chart is legible, centered, and uses a clear color scheme -- it just hasn't yet added a title banner spelling out 'complete monopoly' in words.
level_5: Everything in score 4 holds, plus: the circle for A reads as one unbroken 100% disk, B-E appear only as thin perimeter tick-marks/labels rather than filled wedges (each carrying a sub-0.1% figure), and a title banner names the concept in words (e.g. 'Fully Monopolized Market -- Company A Controls 100% Share'); the whole chart is a plain, static image against a flat background with no legend and no 3D/perspective effects, and the finished chart itself never animates, rotates, or restyles once it has appeared -- the only motion anywhere in the clip is the single sanctioned entrance fade-in described for this demonstration.

Scientific and Causal Correctness rubric:
level_1: The chart depicts a market structure that isn't a monopoly under any reasonable reading -- e.g. two or more companies each hold a visually and numerically substantial share (each clearly above 5%), so the scene reads as an oligopoly or competitive market rather than one firm controlling the entire market; or the percentages shown don't add up to a coherent whole.
level_2: The numbers add up correctly and Company A is shown as the largest holder, but its share isn't large enough to communicate a full monopoly -- e.g. A holds somewhere in the 60-90% range with B-E each still occupying a readily visible sliver -- so a viewer would reasonably call this 'market leader' or 'dominant firm,' not 'sole owner of the entire market.'
level_3: Company A's share is high enough (roughly 98% or more) that a viewer would call this a monopoly at a glance, but the chart still leaves room for doubt about whether it's a true 100% monopoly versus a near-monopoly with token rivals -- e.g. B-E are given precise-looking non-zero figures (like '0.3%') with no title, framing, or visual cue clarifying that these represent non-participating rivals rather than small but real competing firms.
level_4: The chart unambiguously communicates that Company A is the only economically meaningful participant -- B-E's presence is reduced to token/placeholder status (values at or below 0.1%, shown only as small tick labels rather than filled wedge area) -- but the chart doesn't yet actively explain why this counts as a monopoly (no title or caption ties the visual back to the economic definition of monopoly as zero substitutable competition).
level_5: Everything in score 4 holds, and the chart actively teaches the concept: a title or caption explicitly frames Company A's position as a complete monopoly (single seller, no viable competitors), the visual treatment makes clear at a glance that this is categorically different from an oligopoly chart (where three or four firms each hold a double-digit share) rather than merely 'a company with a big lead,' and nothing in the numbers, labels, or framing could be mistaken for a near-monopoly with a marginal but real rival.

Spatiotemporal Consistency rubric:
level_1: The chart's appearance is genuinely broken over time: it flickers or blinks after first appearing, the whole chart or an individual slice/label suddenly jumps to a different size or spot with no visible motion, a label (A-E or the title banner) pops in then disappears then pops back, or the chart visibly drifts around the frame while otherwise looking finished.
level_2: The chart holds still without flickering or jumping, but the layout itself is poorly composed: the circle sits off-center or tilted, or is clipped by the frame edge; two or more labels overlap each other or overlap the slice/title area; font sizing is wildly inconsistent (e.g., the 'A' label is huge while the 'E' label is nearly unreadable); the background flips to a different color mid-clip with no cause; or the title banner appears before the chart itself has been drawn in, breaking the expected reveal order.
level_3: The chart sits centered and stable, all five labels (A-E) plus the title banner stay in place and legible for the full hold; the only shortcoming is presentational -- for instance the chart simply cuts straight to its finished state with no build-up at all (an instant hard cut, not a jarring flicker), or one label sits slightly off from where it should radiate around the circle.
level_4: The chart's appearance is preceded by a brief, smooth entrance (a gentle fade-in or grow-in lasting roughly 1-3 seconds) rather than a jarring instant cut; once settled, the circle, all five labels, and the title banner hold their exact positions without drifting, sliding, or resizing for the rest of the clip; the B-E labels sit at even, radially consistent spots around the circle's edge; no shadow or reflection is drawn onto the flat chart that would distort its reading.
level_5: Everything in score 4 holds, and in addition: the entrance transition is a single unbroken fade or grow with no stutter or double-motion partway through; once the chart settles, a viewer watching through the remaining hold (several seconds) cannot spot any drift in the circle's size, position, or the labels' placement; the background stays a flat, unchanging plain color with no flicker, no camera shake, and no change in brightness anywhere in the clip.