Is VLA Reasoning Faithful? Probing Safety of Chain-of-Causation

In three linesSystematic study of reasoning faithfulness in Vision-Language-Action (VLA) driving models. Analysis of 300 Alpamayo-R1-10B inferences across 100 PhysicalAI-AV scenarios reveals: reasoning fidelity 42.5%, 94 missed pedestrians, 97.7% trajectory fragility under visual perturbations, 48.3% reasoning-action consistency. Proposes four-component safety architecture.

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