"I never heard of the brain experiments," Liu said. "I think that's horrible."

"I think so too," Ruiz said. "It's an old line of research that got sidetracked somehow. I've never understood why some of our megalomaniacs didn't follow it up in human beings. A dictatorship founded on that device might really last a thousand years. But it has nothing to do with what you're asking of Egtverchi. When he's ready to talk, he'll talk. In the meantime, we don't have the stature to compel him to answer questions. For that, we would have to be twelve-foot Lithian adults."

Egtverchi's eyes filmed, and he brought his hands together suddenly.

"You are already too tall," his harsh voice said over the annunciator system.

Liu clapped her hands together in delighted imitation.

"See, see, Ramon, you're wrong! Egtverchi, what do you mean? Tell us!"

Egtverchi said experimentally: "Liu. Liu. Liu."

"Yes, yes. That's right, Egtverchi. Go on, go on — what did you mean — tell us!"

"Liu." Egtverchi seemed satisfied. The colors in his wattles died down. He was again almost a statue.

After a moment, there was an explosive snort from Michelis. Liu turned to him with a start, and, without really meaning to, so did Ruiz. But it was too late. The big New Englander had already turned his back on them, as though disgusted at himself for having broken his own silence. Slowly, Liu too turned her back, if only to hide her face from everyone, even Egtverchi. Ruiz was left standing alone at the vertex of the tetrahedron of disaffection.

"This is going to be a fine performance for a prospective citizen of the United Nations to turn in," Michelis said suddenly, bitterly, from somewhere behind his shoulder. "I suppose you expected nothing else when you asked me here. What moved you to tell me what vast progress he was making? As I got the story, he ought to have been propounding theorems by this time."

"Time," Egtverchi said, "is a function of change, and change is the expression of the relative validity of two propositions, one of which contains a time t and the other a time f-prime, which differ from each other in no respect except that one contains the coordinate t and the other the coordinate f-prime."

"That's all very well," Michelis said coldly, turning to look up at the great head. "But I know where you got it from. If you're only a parrot, you're not going to be a Citizen of this culture; you can take that from me."

"Who are you?" Egtverchi said.

"I'm your sponsor, God help me," Michelis said. "I know my own name, and I know what kind of record goes with it. If you expect to be a citizen, Egtverchi, you'll have to do better than pass yourself off as Bertrand Russell, or Shakespeare for that matter."

"I don't think he has any such notion," Ruiz said. "We explained the citizenship proposal to him, but he didn't give us any sign that he understood it. He just finished reading the Principia last week, so there's nothing unlikely about his feeding it back. He does that now and then."

"In first-order feedback," Egtverchi said somnolently, "if the connections are reversed, any small disturbance will be self-aggravating. In second-order feedback, going outside normal limits will force random changes in the network which will stop only when the system is stable again."

"God damn it!" Mike said savagely. "Now where did he get that? Stop it, you! You don't fool me for a minute!"

Egtverchi closed his eyes and fell silent.

Suddenly Michelis shouted: "Speak up, damn it!"

Without opening his eyes, Egtverchi said: "Hence the system can develop vicarious function if some of its parts are destroyed." Then he was silent again; he was asleep. He was often asleep, even these days.

"Fugue," Ruiz said softly. "He thought you were threatening him."

"Mike," Liu said, turning to him with a kind of desperate earnestness, "what do you think you're doing? He won't answer you, he can't answer you, especially when you speak to him like that! He's only a child, whatever you think when you have to look up at him! Obviously he learns many of these things by rote. Sometimes he says them when they seem to be apposite, but when we question him, he never carries it any farther. Why don't you give him a chance? He didn't ask you to bring any citizenship committee here!"

"Why don't you give me a chance?" Michelis said raggedly.

Then he turned white-on-white. After a moment, so did Liu. Ruiz looked up again at the slumbering Lithian and, as assured as he could be that Egtverchi was truly asleep, pressed the button which brought the rumbling metal curtain down in front of the transparent door. To the last, Egtverchi did not seem to move. Now they were isolated and away from him; Ruiz did not know whether this would make any difference, but he had his doubts about the innocence of Egtverchi's responses. To be sure, he had not overtly done anything but make an enigmatic statement, ask a simple question, quote from his reading — yet somehow everything he said had helped matters to go more badly than before.

"Why did you do that?" Liu said.

"I wanted to clear the air," Ruiz said quietly. "He's asleep, anyhow. Besides, we don't have any argument with Egtverchi yet. He may not be equipped to argue with us. But we've got to talk to each other — you too, Mike."

"Haven't you had enough of that already, Ramon?" Michelis said, in a voice a little more like his own.

"Preaching is my vocation," Ruiz said. "If I make a vice of it, I expect to atone for that somewhere else than here. But in the meantime — Liu, part of our trouble is the quarrel that I mentioned to you. Mike and I sharply disagreed on what Lithia means to the human race, indeed we disagreed on whether Lithia poses us any philosophical question at all. I think the planet is a time bomb; Mike thinks that's nonsense. And he thought that a general article for a scientific audience was no place to raise such questions, especially since this particular question has been posed officially and hasn't been adjudicated yet. And that's one reason why we're all snarling at each other right now, without any surface reason for it."

"What a cold thing to be heated about!" Liu said. "Men are so exasperating. How could a problem like that matter now?"

"I can't tell you," Ruiz said helplessly. "I can't be specific — the whole issue is under security seal. Mike thinks even the general issues I wanted to raise are graveyarded for the time being."

"But what we're waiting for is to find out what's going to happen to Egtverchi," Liu said. "The UN examining group must be already on its way. What business do you have to be hatching philosophical mandrake's-eggs when the life of a — of a human being, there's no other way to put it — is hanging on the next half hour?"

"Liu," Ruiz said gently, "forgive me, but are you so convinced that Egtverchi is what you mean by a human being — a hnau, a rational soul? Does he talk like one? You were complaining yourself that he won't answer questions, and that very often when he speaks he doesn't make much sense. I've talked to adult Lithians, I knew Egtverchi's father well, and Egtverchi isn't much like them, let alone much like a human being. Hasn't anything that's happened in the past hour changed your mind?"

"Oh, no," Liu said warmly, reaching out her hands for the Jesuit's.

"Ramon, you've heard him talk yourself, as much as I have — you've tended him with me — you know he's not just an animal! He can be brilliant when he wants to be!"

"You're right, the mandrake's eggs have nothing to do with the case," Michelis said, turning and looking at Liu with dark, astonishingly pain-haunted eyes. "But I can't make Ramon listen to me. He's becoming more and more bound in some rarefied theological torture of his own. I'm sorry Egtverchi isn't as far along as I'd thought, but I foresaw almost from the beginning, I think, that he was going to be a serious embarrassment to us all, the closer he approaches his full intelligence.