Domain: Healthcare — Pharmacy
Target concept: Comparison of enteric-coated tablets and ordinary tablets in acidic solutions

Video generation prompt: Place a smooth, glossy tablet and a powdery, dull tablet separately into two identical transparent beakers containing colorless acidic liquid, and immerse them side by side.

Evaluation guide:
(i) Target concept: Differential acid resistance of enteric-coated vs. uncoated/ordinary tablets.
Minimum mechanism: Enteric coating is polymer-based and insoluble below pH ~5.5; ordinary tablets contain water-soluble excipients (e.g., starch, lactose) that hydrate and erode in acid; dissolution must manifest as surface disintegration (powdery) vs. structural persistence (glossy).
(ii)Storyline: Frame 1–2: Two identical beakers with colorless liquid, empty and side-by-side. Frame 3–4: Two distinct tablets, glossy and powdery, held above beakers. Frame 5–6: Tablets simultaneously lowered and fully immersed. Frame 7–10: Powdery tablet visibly sheds particles and clouds liquid; glossy tablet remains geometrically intact and optically unchanged, with clear liquid surrounding it. Perspective: Fixed frontal view, centered on beaker pair; full tablet surfaces and liquid interiors must remain continuously visible without occlusion.

Manual:
Experimental Procedure
1. Place two identical transparent beakers side-by-side on a flat surface.
2. Fill both beakers with equal volumes of colorless acidic liquid.
3. Simultaneously place one smooth, glossy tablet into the left beaker and one powdery, dull tablet into the right beaker — fully immersing each.
Observation of Experimental Phenomena
The powdery tablet rapidly disintegrates, releasing particles that cloud the liquid; the glossy tablet remains intact with no erosion, no shape change, and no turbidity in surrounding liquid.
Summary of Experimental Principles
Enteric-coated tablets resist dissolution in acidic environments (e.g., stomach), while ordinary tablets (often with hydrophilic binders or no coating) rapidly disintegrate in acid — demonstrated by differential stability in acidic solution.

Prompt Grounding rubric:
level_1: Fewer than two beakers are shown, or only one tablet appears, or a tablet is not submerged in liquid, or the liquid is colored/cloudy rather than colorless, or the two containers differ in shape/size, or the beakers are stacked/diagonal rather than side by side.
level_2: Two transparent beakers with liquid are shown, but at least one of these is wrong: only one tablet appears (or none), one or both tablets never touch the liquid, the two tablets don't show a clear glossy-vs-powdery contrast in surface finish, or the beakers are not placed next to each other in frame.
level_3: Two identical transparent beakers hold colorless acidic liquid; a smooth glossy tablet sits in one beaker and a powdery dull tablet in the other; both tablets are fully submerged; the beakers sit side by side within one continuous camera framing.
level_4: Everything required for a 3 is present, plus: both tablets stay fully visible with their glossy/dull surface difference easy to tell apart, the liquid fills both beakers to a matching height, and nothing else in frame blocks the view of either tablet or beaker interior.
level_5: Everything required for a 4 is present, plus: the glossy tablet shows a coherent specular highlight while the powdery tablet shows a flat, non-reflective matte surface with no highlight at all; both beakers keep the same orientation, fill level, and glass transparency for the whole clip (independent of the liquid inside, whose turbidity is expected to differ between the two beakers as the tablets dissolve); no overlay, watermark, or compositing artifact intrudes on the shot.

Scientific and Causal Correctness rubric:
level_1: No visible difference in how the two tablets behave: both stay intact, both dissolve, or both dissolve at the same rate and timing; or dissolution starts before either tablet touches the liquid; or the outcome is fully inverted, with the powdery tablet staying whole while the glossy (enteric-coated) tablet is the one that visibly disintegrates or clouds the liquid, directly contradicting the fact that the enteric coating resists acid while the uncoated excipients do not.
level_2: Some visible change occurs, but it doesn't clearly track with which tablet is glossy and which is powdery: for example, both tablets develop a similar faint surface dulling or a few flecks shed from each with no meaningful difference between them, so a viewer cannot tell from the footage that acid resistance depends on the coating; or the powdery tablet's breakup begins noticeably before it is actually immersed.
level_3: The powdery tablet visibly breaks apart in the acid (losing pieces, clouding the liquid around it, or losing its shape) while the glossy tablet keeps its form with no erosion, pitting, or clouding nearby; the contrast is clearly visible and starts once the tablets enter the liquid, not before.
level_4: Everything required for a 3 is present, plus: the powdery tablet's breakup is gradual and keeps progressing rather than happening all at once, the glossy tablet shows no pitting, swelling, or cloudy patches anywhere on its surface, and no unrelated effect (fizzing, bubbling, color change) appears that isn't explained by plain acid-excipient dissolution.
level_5: Everything required for a 4 is present, plus: the powdery tablet's breakup visibly starts at its outer surface and works inward, with particles shedding into the liquid; the glossy tablet keeps a crisp, unbroken outline and even surface sheen the whole time; the liquid around the glossy tablet stays completely clear while the liquid around the powdery tablet grows visibly cloudier, with the cloudiness clearly originating at the tablet's surface and spreading outward.

Spatiotemporal Consistency rubric:
level_1: A tablet suddenly appears in a different spot than the previous frame with no motion connecting the two; a beaker changes size, shape, or angle abruptly; the liquid level jumps from one height to another between frames with no pouring or draining shown; the whole scene's brightness swings from bright to dark with no visible cause; a tablet vanishes or appears with no lowering motion into the beaker.
level_2: Several smaller breaks in continuity appear together: a hard cut interrupts the immersion sequence; the highlight/shadow on a beaker or tablet switches side without the camera or light source moving; a tablet's descent into the liquid looks physically off (for instance drifting upward before dropping); or an object is partly hidden in one frame and fully visible in the next with no clear cause.
level_3: The two beakers stay in the same side-by-side spots throughout, both tablets stay inside their own beaker the whole time, both beakers and both tablets remain fully visible for the whole clip with nothing dropping out of frame partway through, any tablet motion (such as being lowered into the liquid) looks smooth and physically reasonable, and the highlight/shadow pattern on the beakers and tablets stays put from frame to frame.
level_4: Everything required for a 3 is present, plus: there's no flicker or strobing anywhere in the shot, neither beaker nor tablet warps or stretches as if seen through a distorting lens, and the immersion sequence plays without any stutter or repeated frame.
level_5: Everything required for a 4 is present, plus: each tablet's entry into the liquid follows one continuous downward path that visibly slows as it meets the liquid surface, the liquid surface itself stays calm with no odd ripple or splash beyond what the tablet's entry would naturally cause, and the camera holds one fixed viewpoint with no drift throughout the clip.