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A physics reward is not a physics engine
Training a video model to prefer physically plausible results is not the same as giving it a simulator. The distinction matters whenever a model is described as understanding the physical world. LingBot-Video uses a reward system that includes physical rationality and task completion alongside more familiar video criteria. That can push training away from obviously impossible motion. It does not introduce explicit mass, friction, collision geometry, or a numerical integrator. The model is stil...












