Scientific killing is like, throwing a gallon H2SO4 at someone's, or killing someone with poisoness radiation emitted from a bizarre pseudo-futuristic beam gun.
The Repair and Killing, it's like a Yin-Yang thing. The robot repairs thing with a passion. Yet, when it's needed, the robot also knows how to kill, and does it with a satisfaction. Some sort of a love/hate thing going on.