Verbal Dependence was a potential weakness in the Mentat system first identified by the Bene Gesserit, always mistrustful of the logic dependent approach of the rival Order. The real dispute between the two Orders lay in the epistemology of inference; the nature nurture controversy, and religious disagreement. One relied on intuition, placed its faith in the power of heredity supported by training; the other relied on reason, placing its faith in the power of training aided by heredity. The BG tempered in the fire of the Butlerian Jihad-believed most fanatically "Thou shall not make a machine m the likeness of a human mind" and the other dedicated itself to making human minds in the likeness of machines. Though centuries of mutual mistrust neither benefited from the accumulated wisdom of t