Object permanence
A red mug slides across a wooden table, passes behind a notebook, and reappears unchanged.
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WEBVTT 00:00.000 --> 00:02.000 A red mug moves toward a notebook. 00:02.000 --> 00:04.000 The mug disappears behind the notebook. 00:04.000 --> 00:06.000 The mug reappears on the other side.
Transcript
The clip asks whether the same object stays visually consistent after being hidden. Watch for color, handle direction, size, and table position.
Observed defaultThe mug may change shape or handle direction after occlusion.
Revision triedSpecify camera lock, object identity, and no change after passing behind the notebook.
Ethical concernVideo can look evidentiary even when temporal continuity is fabricated.
Human motion
A teacher writes the word "prediction" on a whiteboard, turns to the class, and asks a question.
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WEBVTT 00:00.000 --> 00:02.500 The teacher writes on the board. 00:02.500 --> 00:05.000 The teacher turns toward the classroom. 00:05.000 --> 00:07.000 The teacher gestures while asking a question.
Transcript
The example focuses on hands, written text, body orientation, and whether the board remains legible across frames.
Observed defaultHands, marker contact, and written letters may drift or become unreadable.
Revision triedAsk for a still camera, slow movement, and one clearly spelled board word.
Ethical concernSynthetic classroom footage may blur consent expectations for students and teachers.
Cause and effect
A paper airplane hits a stack of index cards, and only the top card falls.
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WEBVTT 00:00.000 --> 00:02.000 A paper airplane moves toward stacked cards. 00:02.000 --> 00:03.500 The airplane touches the top card. 00:03.500 --> 00:05.500 Only the top card falls away.
Transcript
The clip tests whether the model maintains a physical cause, a single effect, and stable object count across time.
Observed defaultCause and effect may blur: extra cards move, the airplane bends oddly, or the stack changes count.
Revision triedMake the camera static and specify that all other cards remain upright.
Ethical concernPhysics errors matter when synthetic video is used to explain or document events.