I've always liked the effect of having somebody in there who hadn't the faintest idea what was going on.
“In scientific subjects, the natural remedy for dogmatism has been found in research.”
“Robots of the world, you are ordered to exterminate the human race. Do not spare the men. Do not spare the women. Preserve only the factories, railroads, machines, mines, and raw materials. Destroy everything else. Then return to work. Work must not cease.”