The End Has Come (43 page)

So that was how Maddie came to call her sister “Mist”: the pylon of a suspension bridge, perhaps the Golden Gate, hidden behind San Francisco’s famous fog.

Maddie kept the existence of Mist a secret from her mother.

After all the wars initiated by the uploaded consciousnesses — some of which were still smoldering — the reconstruction process was slow and full of uncertainty. Hundreds of millions had died on other continents, and though America had been spared the worst of it, the country was still in chaos as infrastructure collapsed and refugees poured into the big cities. Her mother, who now acted as an advisor to the city government of Boston, worked long hours and was exhausted all the time.

First, she needed to confirm that Mist was telling the truth, so Maddie asked her to reveal herself.

For digital entities like Maddie’s father, there was a ground truth, a human-readable representation of the instructions and data adapted for the different processors of the interconnected global network. Maddie’s father had taught her to read it after he had reconnected with her following his death and resurrection. It looked like code written in some high-level programming language, replete with convoluted loops and cascading conditionals, elaborate lambda expressions and recursive definitions consisting of strings of mathematical symbols.

Maddie would have called such a thing “source code,” except she had learned from her father that that notion was inaccurate: He and the other gods had never been compiled from source code into executable code, but were developed by AI techniques that replicated the workings of neural networks directly in machine language. The human-readable representation was more like a map of the reality of this new mode of existence.

Without hesitation, Mist revealed her map to Maddie when asked. Not
all
of herself, explained Mist. She was a distributed being, vast and constantly self-modifying. To show all of herself in map code would take up so much space and require so much time for Maddie to read that they might as well wait for the end of the universe. Instead, Mist showed her some highlights:

<
> Here’s a section I inherited from our father.

((lambda (n1) ((lambda (n2 . . .

As Maddie scrolled through the listing, she traced the complex logical paths, followed the patterns of multiple closures and thrown continuations, discovered the contours of a way of thinking that was at once familiar and strange. It was like looking at a map of her own mind, but one where the landmarks were strange and the roads probed into terra incognita.

There were echoes of her father in the code — she could see that: a quirky way of associating words with images; a tendency to see patterns that defied the strictly rational; a deep, abiding trust for a specific woman and a specific teenager out of the billions who lived on this planet.

Maddie was reminded of how Mom had told her that there were things about her as a baby that defied theories of upbringing, that told her and Dad that Maddie was
their
child in a way that transcended rational knowledge: the way her smile reminded Mom of Dad even at six weeks; the way she hated noodles the first time she tried them, just like Mom; the way she calmed down as soon as Dad held her, even though he had been too busy with Logorhythms’s IPO to spend much time with her during the first six months of her life.

But there were also segments of Mist that puzzled her: the way she seemed to possess so many heuristics for trends in the stock market; the way her thoughts seemed attuned to the subtleties of patents; the way the shapes of her decision algorithms seemed adapted for the methods of warfare. Some of the map code reminded Maddie of the code of other gods Dad had shown her; some was entirely novel.

Maddie had a million questions for Mist. How had she come to be? Was she like Athena, sprung fully-formed from her father’s mind? Or was she something like the next generation of an evolutionary algorithm, inheriting bits from her father and other uploaded consciousnesses with variations? Who was her other parent — or maybe parents? What stories of love, of yearning, of loneliness and connection, lay behind her existence? What was it like being a creature of pure computation, of never having existed in the flesh?

But of one thing Maddie was certain: Mist was her father’s daughter, just as she had claimed. She was her sister, even if she
was
barely human.

• • • •

What was life in the cloud with Dad like?

<
>

Like her father, Mist had a habit of shifting into emoji whenever she found words inadequate. What Maddie got out of her response was that life in the cloud was simply beyond her understanding and Mist did not have the words to adequately convey it.

So Maddie tried to bridge the gap the other way, to tell Mist about her own life.

Grandma and I had a garden back in Pennsylvania. I was good at growing tomatoes
.

<
>

Yep. That’s a tomato
.

<
> I know lots about tomatoes: lycopene, Cortéz, nightshade, Mesoamerica, ketchup, pomodoro, Nix v. Hedden, vegetable, soup. Probably more than you.

<
> You seem really quiet.