"I am over five hundred years old. I was originally a man, the same as yourself, and one of the few real scientists our race has produced. I limited my activity to no one field, but delved into anything that interested me. One of my interests was longevity. When I decided that immortality was limited by the weaknesses of the bodily vehicle to which I was tied, I designed this instrument in which my brain resides, and trained others to make the essential transfer. Does that answer your questions?" "All except the extent of your intellectual ability. The rumor is that you know everything." "That, of course, is ridiculous. Knowledge is like a fan-shaped wave; beginning with the first fact learned, and spreading wider and wider the more one learns. I started with an exceptional intellect, and for five hundred years have acquired as much knowledge as that intellect, and a vast curiosity, could give me." "I see," Ostby said as he framed the next question in his mind. "What is your relationship with the Imperator?" he asked. "Are you an ally or a servant?" "That is a bit difficult to answer," the Brain said, "because it depends on the viewpoint of the observer. As far as Magogar is concerned, I suppose I am both, though surely more of a servant than an equal. As I regard it, he is merely another man, though one who supplies me with most of the material for speculation which I desire." "Are you loyal to him?" "As you mean it, no. Loyalty implies an emotional basis. I'm afraid that I have none of the standard emotions. I will answer any question put to me by anyone. I care nothing about the purpose of the question or to what use the answer is put." "Could I ask a question, in confidence, and be certain that you would not reveal that I did so to the Imperator?" Ostby asked. This could be placing his neck in the noose, he knew, and he waited anxiously for the answer. "No," the Brain replied. "I would volunteer nothing to him, but I would tell him anything he asked." Ostby decided that he needed time to think over this facet of the Brain before he ventured further. First, he would attempt to learn other facts which he might need later. Perhaps he could even obtain the answer he wanted in a roundabout way. "What is the population of your world?" he asked. "Approximately seven million. Over a million live here, in Yarr, our one mechanized city." "Why is it that you have so little technology, as compared with the Earth?" "I suppose that its basis is our low birth rate," the Brain answered. "There is ample living space here, as well as natural resources, to supply our people's needs. Thus there is little necessity for them to shape and remake their environment. It is always easiest to accept nature as it is, if that can be done with a minimum of self-adjusting." "Then why is this city of Yarr different?"