A ripple moves through the room, not as noise but as surprised attention recalibrating.
She continues without looking at anyone but me. “You’ve defined the noise as uncorrelated, but the feedback loop reintroduces it with a delay. That creates dependency across iterations. The error term isn’t dissipating, it’s accumulating.” Which means stability only exists in the short term,” she finishes. “After that, the system diverges.”
I don’t interrupt her to correct her phrasing. I don’t step in to reclaim control of the room.
Instead, I slowly turn back to the board.
I redraw a single segment of the model—adjusting the feedback delay, isolating the frequency path, and making visible the propagation she just described.
The structure responds immediately, just as I assumed. The flaw surfaces as cleanly as if it had been waiting for permission to be acknowledged.
She hasn’t just answered the question. She’s reframed the problem.
A few students shift in their seats now, their earlier certainty evaporating as they stare at the board with dawning comprehension.
Others look at her, then back at the system, recalculating their understanding of both.
I set the stylus down.
“That’s the correct interpretation, thank you, Miss Keinston.”
She smiles shyly, not triumphantly.
I turn back to the class, already moving on, already folding the corrected model into the broader framework of the lecture.
But internally, I know Keinston’s money didn’t buy that intelligence. Someone taught her. Or more troubling still, she taught herself.
Either way, she isn’t an accident. She’s a dangerously unclassified variable in my equation.
8. UNREPENTANT
ariella
He noticed me.
No, wait. He talked to me.
I still can’t quite wrap my head around it. My Prince Charming—the one who lived behind screens and lecture thumbnails and carefully curated angles—acknowledged my presence. Out loud. In person. Not as a distant fantasy, not as pixels and sound waves, but as my professor.
I’m not just watching him anymore.
I’m sitting in his class.
I’m his student.
O. M. F. G.
My chest feels too full, like it might split open if I breathe too deeply. I’m floating—no, soaring—somewhere far above cloud nine.
This has to be a dream. It has to be.
When I first learned he only taught senior undergraduates, the disappointment nearly hollowed me out. But there’s nothing a Keinston can’t do.
I bought my way in—yes. I’m not naïve enough to pretend otherwise. So, answering those questions? That part was all me.
I didn’t just watch his recorded lectures on YouTube—I memorized them. Every pause, every emphasis, every turn of phrase. I absorbed higher-level engineering the way others memorize lyrics.
Though part of me is glad the students who were supposed to get those answers failed. It left me alone under the spotlight. In front of him.