Video LMMs name objects and actions reliably but fail to detect the precise frames and locations of contact and release events, revealing shortcut learning instead of physical grounding.
### Chain of Thought - The event of interest here is the interaction between the hand and the white circular object
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Action Without Interaction: Probing the Physical Foundations of Video LMMs via Contact-Release Detection
Video LMMs name objects and actions reliably but fail to detect the precise frames and locations of contact and release events, revealing shortcut learning instead of physical grounding.