Элиезер Юдковски: Three Worlds Collide

Three Worlds Collide

©2009 by Eliezer S. Yudkowsky

http://www.overcomingbias.com/2009/01/three-worlds-collide.html

(1/8) The Baby-Eating Aliens

This is a story of an impossible outcome, where AI never worked, molecular nanotechnology neverworked, biotechnology only sort-of worked; and yet somehow humanity not only survived, but

discovered a way to travel Faster-Than-Light: The past's Future.

Ships travel through the Alderson starlines, wormholes that appear near stars. The starline network isdense and unpredictable: more than a billion starlines lead away from Sol, but every world explored isso far away as to be outside the range of Earth's telescopes. Most colony worlds are located only asingle jump away from Earth, which remains the center of the human universe.

From the colony system Huygens, the crew of the Giant Science Vessel Impossible Possible World have set out to investigate a starline that flared up with an unprecedented flux of Alderson force beforesubsiding. Arriving, the Impossible discovers the sparkling debris of a recent nova - and -

"ALIENS!"

Every head swung toward the Sensory console. But after that one cryptic outburst, the Lady Sensory didn't even look up from her console: her fingers were frantically twitching commands.

There was a strange moment of silence in the Command Conference while every listener thought the

same two thoughts in rapid succession:

Is she nuts? You can't just say "Aliens!", leave it at that, and expect everyone to believe you.

Extraordinary claims require extraordinary evidence -

And then,

They came to look at the nova too!

In a situation like this, it befalls the Conference Chair to speak first.

"What? SHIT!" shouted Akon, who didn't realize until later that his words would be inscribed for all time in the annals of history. Akon swung around and looked frantically at the main display of the Command Conference. "Where are they?"

The Lady Sensory looked up from her console, fingers still twitching. "I - I don't know, I just picked up an incoming high-frequency signal - they're sending us enormous amounts of data, petabytes, I had to clear long-term memory and set up an automatic pipe or risk losing the whole -"

" Found them! " shouted the Lord Programmer. "I searched through our Greater Archive and turned up a program to look for anomalous energy sources near local starlines. It's from way back from the first days of exploration, but I managed to find an emulation program for -"

" Just show it! " Akon took a deep breath, trying to calm himself.

The main display swiftly scanned across fiery space and settled on... a set of windows into fire, the fire of space shattered by the nova, but then shattered again into triangular shards.

It took Akon a moment to realize that he was looking at an icosahedron of perfect mirrors.

Huh, thought Akon, they're lower-tech than us. Their own ship, the Impossible, was absorbing the vast quantities of local radiation and dumping it into their Alderson reactor; the mirror-shielding seemed a distinctly inferior solution. Unless that's what they want us to think...

" Deflectors! " shouted the Lord Pilot suddenly. "Should I put up deflectors?"

"Deflectors?" said Akon, startled.

The Pilot spoke very rapidly. "Sir, we use a self-sustaining Alderson reaction to power our starline jumps and our absorbing shields. That same reaction could be used to emit a directed beam that would snuff a similar reaction - the aliens are putting out their own Alderson emissions, they could snuff our absorbers at any time, and the nova ashes would roast us instantly - unless I configure a deflector -"

The Ship's Confessor spoke, then. "Have the aliens put up deflectors of their own?"

Akon's mind seemed to be moving very slowly, and yet the essential thoughts felt, somehow, obvious.

"Pilot, set up the deflector program but don't activate it until I give the word. Sensory, drop everything else and tell me whether the aliens have put up their own deflectors."

Sensory looked up. Her fingers twitched only briefly through a few short commands. Then, "No," she said.

"Then I think," Akon said, though his spine felt frozen solid, "that we should not be the first to put this interaction on a... combative footing. The aliens have made a gesture of goodwill by leaving

themselves vulnerable. We must reciprocate." Surely, no species would advance far enough to colonize space without understanding the logic of the Prisoner's Dilemma...

"You assume too much," said the Ship's Confessor. "They are aliens."

"Not much goodwill," said the Pilot. His fingers were twitching, not commands, but almost-commands, subvocal thoughts. "The aliens' Alderson reaction is weaker than ours by an order of magnitude. We could break any shield they could put up. Unless they struck first. If they leave their deflectors down, they lose nothing, but they invite us to leave our own down -"

"If they were going to strike first," Akon said, "they could have struck before we even knew they were here. But instead they spoke." Surely, oh surely, they understand the Prisoner's Dilemma.

"Maybe they hope to gain information and then kill us," said the Pilot. "We have technology they want. That enormous message - the only way we could send them an equivalent amount of data would

be by dumping our entire Local Archive. They may be hoping that we feel the emotional need to, as you put it, reciprocate - "

"Hold on," said the Lord Programmer suddenly. "I may have managed to translate their language."

You could have heard a pin dropping from ten lightyears away.

The Lord Programmer smiled, ever so slightly. "You see, that enormous dump of data they sent us - I think that was their Local Archive, or equivalent. A sizable part of their Net, anyway. Their text, image, and holo formats are utterly straightforward - either they don't bother compressing anything, or they decompressed it all for us before they sent it. And here's the thing: back in the Dawn era, when there were multiple human languages, there was this notion that people had of statistical language translation. Now, the classic method used a known corpus of human-translated text. But there were successor methods that tried to extend the translation further, by generating semantic skeletons and trying to map the skeletons themselves onto one another. And there are also ways of automatically looking for similarity between images or holos. Believe it or not, there was a program already in the Archive for trying to find points of linkage between an alien corpus and a human corpus, and then

working out from there to map semantic skeletons... and it runs quickly, since it's designed to work on older computer systems. So I ran the program, it finished, and it's claiming that it can translate the alien language with 70% confidence. Could be a total bug, of course. But the aliens sent a second message that followed their main data dump - short, looks like text-only. Should I run the translator on that, and put the results on the main display?"

Akon stared at the Lord Programmer, absorbing this, and finally said, "Yes."

"All right," said the Lord Programmer, "here goes machine learning," and his fingers twitched once.

Over the icosahedron of fractured fire, translucent letters appeared:

THIS VESSEL IS THE OPTIMISM OF THE CENTER OF THE VESSEL PERSON

YOU HAVE NOT KICKED US

THEREFORE YOU EAT BABIES

WHAT IS OURS IS YOURS, WHAT IS YOURS IS OURS