It's been a long time since I read through my father's Asimov book collection, so pardon my question: but how are these rules considered "laws", exactly? IIRC, USRobotics marketed them as though they were unbreakable like the laws of physics, but the positronic brains were engineered to comply with them - which while better than inlining them with training or inference input - but this was far from foolproof.