and giskard was only a robot , in baley 's eyes , however much he might be a `` he '' and however much one did not mention the `` r. '' if baley were scratching himself , picking his nose , engaged in any messy biological function , it seemed to him that giskard would be indifferent , nonjudgmental , incapable of reacting in any way , but coldly recording the observation in some inner memory bank .