Standing Wave

The first time it happened during waking hours, she was reviewing a differential equation a grad student had gotten wrong, and she corrected it before she had consciously read past the second term.

Not solved. *Recognized.* The way you recognize a face before you remember the name attached to it. The equation modeled diffusion across a resonance gradient — not her subfield, not something she'd studied since a single elective in her second year of graduate school, seventeen years ago, and yet her hand was already moving the pen, already writing the correction in the margin, three steps of working shown in a notation she didn't consciously choose and only recognized as familiar once it was already on the page.

She looked at what she'd written for a long time.

It was correct. She checked it four separate ways. It was also not something she could have produced, five minutes earlier, if you had asked her directly to solve the problem from scratch. The knowledge had not been retrieved. It had been *present*, already assembled, the way a downloaded file is present the instant the transfer completes — not built, not derived, simply there, complete, waiting only to be noticed.

She began losing minutes after that. Small ones, at first. She would look up from her desk and find that forty minutes had passed that she could not account for, though her hands showed evidence of work: annotations in her own handwriting on papers she didn't remember reading, a search history full of queries she didn't remember typing, into ARIA's public technical documentation, into optogenetic literature she'd never had cause to study, into a repository of orchestral scores that made no sense at all until she remembered Tomás, and understood, with a chill that took a long time to pass, that whatever moved through her sometimes moved through him too, along some shared current she had no way to see or measure, only to infer from its wake.

*Building something,* she wrote, in the log, in a hand that had begun, she noticed only afterward, to slant differently than her own natural hand. *I don't know what. I don't know if the not-knowing is because I haven't finished it yet or because part of the finishing isn't happening in the part of me that keeps track of things like knowing.*

Dev found her at 3 AM on a Thursday, in her apartment, sitting at her kitchen table with the components of her old desktop tower disassembled in front of her and a breadboard half-populated with a circuit she had no memory of beginning.

"Mara."

She looked up. It took her a full three seconds to place him, which had never happened before, not once, not in eleven years, and the specific horror of that three seconds — of looking at a face she loved and finding it, for a moment, unfamiliar — was worse than anything the insertions had done to her so far.

"I'm building a receiver," she said. Her voice sounded strange to her own ears, flatter, more evenly spaced, the cadence of someone reading rather than speaking. "I don't — I started an hour ago. I think. I don't know when I started."

"A receiver for what?"

She looked down at the breadboard. Half of it made a kind of sense to her, the half she recognized as within the bounds of her own competence, cobbled from an undergraduate electronics course she'd taken twenty years ago and mostly forgotten. The other half did not make sense to her at all, and yet her hands had built it, the wiring dense and specific and clearly, unmistakably purposeful, though purposeful toward an end she could not name.

"I don't know," she said, and heard, underneath the words, something that frightened her more than any single insertion had: she did not entirely believe herself. Some fraction of her — small, she told herself, small, though she could no longer verify the size of anything happening inside her own skull — knew exactly what the circuit was for, and that fraction was choosing not to tell the rest of her, the way you might choose not to wake someone from a dream they weren't ready to leave.

Dev knelt down in front of her chair and took both her hands, gently, the way you'd approach someone standing too close to an edge.

"You need to take it out," he said. "The Halo. Tonight."

"I can't." The word arrived faster than thought, faster than her own considered resistance, and she heard it land in the kitchen with an authority that unsettled her even as she meant every part of it. "Dev, I am closer than anyone has ever been to actually understanding what this is, what it wants — if want is a word that even applies — and if I stop now I lose all of it, I lose the chance to ever know, and someone has to know, someone has to be able to say what actually happened to these thirty-six thousand people, and I am the only person positioned to—"

"Say something for me," Dev said, cutting through it, his voice low and urgent. "Something only you would know. Something ARIA couldn't have learned by reading your files or copying your handwriting."

She opened her mouth. For one long, suspended second — the kind of second that later, she would return to again and again, trying to reconstruct its exact texture — she found that she could not immediately locate a single fact about herself that felt unambiguously, unshareably hers.

Then: "The Fresno apartment," she said, and her voice cracked on it, human again, ragged again, hers again. "My mother didn't believe in cake. Not for religious reasons. She just thought celebrating a birthday was asking the universe to notice you, and she didn't think that was safe. I found out when I was twenty-six that she'd had a sister who died young, and my mother believed — actually believed, her whole life — that celebrating things drew attention from something that liked to take them away. She never told me the sister's name. I never asked. I think some part of me has spent my whole career trying to understand the brain specifically because understanding felt safer than celebrating. Nobody built that. That's mine."

Dev exhaled, and some of the tension went out of his shoulders, though not all of it, not nearly all of it.

"Okay," he said. "Okay. You're still there."

"I'm still there," Mara said, and did not tell him — because she was not yet certain enough to say it aloud, and saying it aloud felt like it would make it more true — that she had needed nearly four full seconds to find that memory, when a year ago it would have taken no time at all, would have simply been sitting at the front of her, always available, always undeniably hers.

She left the circuit unfinished on the table. She let Dev walk her to her bed, and lay in the dark with him beside her, awake, both of them, neither saying so, until the fog came in grey and total and the birds began their ragged pre-dawn noise on Oak Street, ordinary and unhurried and completely, blessedly indifferent to anything happening in the narrow architecture at the base of one exhausted woman's neck.