Aranimas picked up the damaged powerpack and studied it. “So small. How days’ service does it contain?”
“It depends on how hard the robot is working. The fuel capsule is good for several hundred days of light duty, like domestic service. A laborer would obviously need refueling more often.”
“Remarkable,” Aranimas said, returning the powerpack to the bench. One of his eyes seemed to focus briefly on the transplanted arm, then swung back toward Derec. “You are making progress?”
“I am.”
“How long until you are ready to activate it?”
“I’ll be ready to start testing its systems tomorrow or the next day. How soon it’ll be ready will depend on how much is wrong.”
Aranimas seemed to accept that. “The first job of this robot will be to help you make more robots.”
Frowning, Derec stepped forward. “How many more?”
“We will begin with fifty.”
Derec wondered if that figure represented the number of Narwe on board. He briefly enjoyed the thought of Aranimas replacing his browbeaten crew with an array of obedient robots, only to discover that, at a word from Derec, he couldn’t command them at all. But he could not kid himself or allow Aranimas to entertain unreasonable expectations.
“I don’t think you understand the complexity of these machines,” Derec said. “They’re not something you put together as a hobby, no matter how good a materials lab you have. And frankly, this isn’t a very good one. I’ll probably be able to get this robot put together and keep it repaired. But if you want fifty robots, you’re going to have to look somewhere else for them. I’m not magician enough to pull positronic brains or microfusion cells out of a hat.”
“If you had not destroyed your robot colony-,” Aranimas said, his voice rising.
“I told you before, the robots did that on their own,” Derec insisted. “But that doesn’t mean you’re stuck. You take this ship to any Spacer world and you’ll find millions of robots. And you won’t have to steal them, either. Robots are a major trade item between the worlds. Any one of them would be happy for a new customer.”
That was not entirely true, of course. It was highly doubtful the Spacers would willingly turn over examples of their most advanced technology to an alien race, and even if they were willing, there was the problem of what Aranimas could offer as payment. But if Derec could make Aranimas believe it was the truth, coax him to take the ship to a human world, he would at least have succeeded in alerting them to the aliens’ existence, and possibly have laid the groundwork for his own release.
“If commerce is so welcome, why did your robots destroy themselves?”
“Because you came in firing your weapons and declared yourself an enemy,” Derec said. “If you’d come in as a friend, it would have been different. Take me to your navigator. I’ll help him set a course for the nearest Spacer world.” And find out where we are in the process, he added silently.
“I will evaluate the options,” Aranimas said, moving toward the corridor. “In the meantime, you will continue your work. I will return tomorrow to see my robot activated.”
The reprogramming could not be postponed any longer, Derec decided, He did not think Aranimas would return soon. He would have to hope that Wolruf would not, either.
Unfortunately, Derec did not have the equipment to alter the robot’s programming directly, which would have been risky anyway. Since it was intimately bound up in the Laws of Robotics, the robot’s definition of what a human was comprised some of the most crucial and most deeply engraved patterns within its brain. What needed doing would have to be done more indirectly.
“Alpha,” he said. “Did you scan the organism that was just here?”
“Yes, Derec.”
“And earlier today, did you scan another type of organism visiting the lab?”
“Yes, Derec.”
“What’d you think of them?”
“I have no previous knowledge of humans of this type-”
That was the kind of response Derec had been fearing. “Stop. They’re not humans.”
“Sir, I am aware that my data library is not complete. However, I am unable to categorize them in any other fashion unless you can provide me with evidence for your assertion.”
“Compare their appearance with mine.”
“Sir, I acknowledge that there are numerous anomalous differences. However, those differences fall in areas where the definition of a human has a wide latitude, such as skin color and covering, dimensions, and vocal timbre. The similarities are in more fundamental areas such as bilateral symmetry, bipedal locomotion, oxygen respiration-”
“They are humanoid, as you are. But they are not human.”
“I note your assertion, sir, but I am unable to confirm it.”
Derec understood that he was not being called a liar. When it had no independent knowledge, a robot would ordinarily accept the word of a human as gospel. But a robot was under no obligation to accept a human’s claim that it was raining when its own sensors told it otherwise.
This was not that clear-cut an issue, but the robot was biased toward a generous definition of what a human was. Otherwise there was the danger of a robot’s being used as an assassin by the simple step of persuading it that its target was not a human. Derec understood, but even so was annoyed. “I suppose that if they had twelve arms and belched fire when they talked, you might believe me.”
“Sir, in the matter at hand the morphological considerations are not primary in my analysis.”
“Explain. What are the discriminators?”
“Sir, I base my conclusion on the observation that the organisms called Aranimas and Wolruf are intelligent beings capable of independent reasoned thought.”
“How do you know?”
“Sir, you carried on a dialogue with each of them. Although humans on occasion talk to nonanimate objects and may give the appearance of carrying on a dialogue with certain animals, I perceived your discussions as having a qualitatively different character.”
“Are you saying that because I treated them as human, you have to think of them that way?”
“Where there is uncertainty, as thee may be when a human wears a costume or disguise, I am obliged to use such cues as are available. Your behavior created a strong presumption that Aranimas and Wolruf are human.”
“I talk to you the same way I talked to them. Does that make you a human?”
“No, Derec. I am a robot, a technological artifact. To the degree that I may seem to be human, it is only because I have been designed to do so in order to more easily interact with humans.”
Derec was growing frustrated. “Tell me this, then. How do you tell the difference between a robot and a human at a distance?”
“Sir, just as I have an operational definition of that class of organisms called humans, I also have one of that class of objects called robots. It is ordinarily possible to distinguish between the two based on the characteristics they do not have in common. It is not a perfect system, however, and may be fooled, as by a humaniform robot of the type developed by Dr. Han Fastolfe.”
Derec had to concede the point to the robot.If only I could show it skin scrapings from the three of us-but if Aranimas or Wolruf happened to have a cellular structure, I’d be no better off. It might even decide its right arm is human-
“Robot, are Spacers, Settlers, and Earthpeople all human?” he asked suddenly.
“Yes.”
“Have you personally observed every member of those groups?”
“No, Derec. There are approximately eight billion Earthpeople, five billion Spacers, and-”
“If you have not observed them individually, how is it you are able to classify them all as human?”
“Spacers and Settlers are descendants of the original human community on Earth,” the robot replied. “Therefore, any individual correctly identified as a Settler or Spacer cannot be other than human.”
“Why is that?” Derec asked, though he knew the answer.
“They share a phylogenetic relationship. The offspring of a human must be human.”
“In other words, what really counts is biology-the genes and DNA humans carry in their cells.”