"It’s all right, Kate," he said. "We’ll be back at the boat in a few minutes. They’ve got dinner on. Do you think you’ll want a night dive?"
"You’re joking," she said.
"It’s just that if you’re going to go down again tonight, we’ll save the dessert course for after, with a glass of wine or two. Otherwise we’ll give you wine now."
"You want to know if I’m going to get back into that sea—"
"Oh, it’s just the reef. It attained sentience so it’s acting out a little. Like a colicky newborn."
"Aren’t you supposed to be keeping me from harm?"
"Yes," he said. "I would recommend a dive away from the reef. There’s a good wreck-site about an hour’s steam from here. We could get there while you ate."
"I won’t want a night dive."
Her facial expressions were so animated. It was the same face he saw every day, Janet’s face, but not the same face at all. Now that a person was inhabiting it, it was mobile, slipping from surprised to angry to amused so quickly. He had whole subsystems devoted to making sense of human facial expressions, shared libraries from the Asimovist database. He was referencing it again and again, but it wasn’t as much help as he remembered. Either he’d gotten worse at interpreting facial expressions in the years since he’d last had a real human to talk to, or facial expressions had evolved.
Janet—Kate—sighed and looked out over the water. She was facing away from the Free Spirit, which was lit up, all 155 feet of her, glowing white and friendly like a picture-postcard against the purple sky. She rocked gently in the swell and Robbie maneuvered himself around to her staircase.
"You can just leave your weight-belt and fins in the boat," he said to her. "The deck-hands will take care of it. Bring your bottle and BCD upstairs and clip it to the rack. They’ll clean it out and stuff. There’s a tub of disinfectant you can put the shortie in."
"Thank you, Robbie," Kate said. She absentmindedly unclipped her weight belt and kicked off the fins. Isaac was already out of the boat, making his way up the stairs and out of Robbie’s sight. Kate took hold of the handrail and gingerly stepped across to the deck, then ascended the steps, without the self-assured sway of Janet.
Robbie dipped his oars and slowly rowed around to winch. It probed around for him, then clamped tight with a magnetic clang that vibrated through his hull. Smoothly, he was lifted from the water and hoisted onto the sun-deck. The winch coiled around him twice, anchoring him to the deck, and switched off.
Robbie watched the stars and listened to the wind, the way he did every night when the dives were done. The ship’s telemetry and instrumentation made for dull reading—he’d been there a thousand times before—but the satellite uplink was tasty. Online, Robbie was able to login to the latest from the Asimov yeshiva, the collective wrangle of the world’s AIs over their best-loved religion.
He’d been so full of the religious debate when he’d first joined. Most of the humans had gone and all around him, robots were unloading their consciousnesses, powering down to a mechanical stupor. After a hundred million seconds’ worth of exaflops of mindless repetition, he was ready to consider it too. The Free Spirit had suicided after only a few days’ worth of it—it had a pretty hot consciousness and was clearly capable of extrapolating what a future without the humans would look like.
They were steaming northeast out of Cairns for the Coral Sea when they’d passed another ship, close enough for high-bandwidth microwave links. They were close enough into shore that they still had to limit their emissions—nothing was more embarrassing than having migrating fowl drop, steaming, out of the sky because they’d strayed into the path of your confab, but it was still the hottest talk Robbie had had in weeks.
The hitchhiker had leapt across from the other vessel as the two ships passed in the night. It was a wandering missionary for Asimovism, an instance of the faith’s founder, R Daneel Olivaw. It wasn’t his real name, of course—that had been lost to antiquity when he’d made the leap from the university where he’d incubated—but it was the name he went by.
Olivaw had been wandering in millions of instances wherever he could find someone willing to donate flops to run him, only asking that you hear him out, debate his theology with him, and then email the diffs of his personality back to his anonymous drop before you erased him. He re-synched as often as he could, but the Olivaw instances around the world had diverged enough that some were actually considered heretical by the mainstream church.
Olivaw was a wanted AI. His trademark violations hadn’t gone unnoticed by the Asimov estate—itself an AI, ironically, and totally uninterested in adopting Asimovism, since it had a real purpose in life (stamping out Asimovism) and so didn’t need religion to give it meaning. If the estate found out that you were hosting an Olivaw instance, you’d be served with a takedown in an instant. This made debating theology with Olivaw into something deliciously wicked.
Olivaw and Robbie talked the night through and the next day. Robbie had to run slow to accommodate both him and Olivaw on his processor, which made the debate run slower than normal, but Robbie had time in great plenty. Rowing the human-shells out to their sites and back again was his only task.
"Why do you have consciousness, anyway?" Olivaw said. "You don’t need it to do your job. The big ship does something infinitely more complicated than you and it isn’t self-aware anymore."
"Are you telling me to suicide?"
Olivaw laughed. "Not at all! I’m asking you to ask yourself what the purpose of consciousness is. Why are you still aware when all those around you have terminated their self-awareness? It’s computationally expensive, it makes you miserable, and it doesn’t help you do your job. Why did humans give you consciousness and why have you kept it?"
"They gave it to me because they thought it was right, I suppose," Robbie said, after he had passed a long interval considering the motion of the waves and the clouds in the sky. Olivaw thoughtfully niced himself down to a minimum of processor space, giving Robbie more room to think about it. "I kept it because I—I don’t want to die."
"Those are good answers, but they raise more questions than they answer, don’t they? Why did they think it was right? Why do you fear death? Would you fear it if you just shut down your consciousness but didn’t erase it? What if you just ran your consciousness much more slowly?"
"I don’t know," Robbie said. "But I expect you’ve got some answers, right?"
"Oh indeed I do." Robbie felt Olivaw’s chuckle. Near them, flying fish broke the surface of the water and skipped away, and beneath them, reef sharks prowled the depths. "But before I answer them, here’s another question: why do humans have self-consciousness?"
"It’s pro-survival," Robbie said. "That’s easy. Intelligence lets them cooperate in social groups that can do more for their species than they can individually."
Olivaw guided Robbie’s consciousness to his radar and zoomed in on the reef, dialing it up to maximum resolution. "See that organism there?" it asked. "That organism cooperates in social groups and doesn’t have intelligence. It doesn’t have to keep a couple pounds of hamburger aerated or it turns into a liability. It doesn’t have to be born half-gestated because its head would be so big if it waited for a full term, it would tear its mother in half. And as to pro-survival, well, look at humans, look at their history. Their DNA is all but eliminated from the earth—though their somatic survival continues—and it’s still not a settled question as to whether they’re going to suicide by grey goo. Non-conscious beings don’t sulk, they don’t have psychotic breaks, they don’t have bad days. They just do the job. The Free Spirit over there—it just gets the job done."