Chương 7
Nobody had told him to.
Sam pointed at him.
"Yes?"
"Why would they make it lock if locking makes me fall?"
Sam paused.
"That's a very good question."
Owen waited.
Sam did not hide behind technical language.
"Because sometimes engineers choose between different bad outcomes."
"Like what?"
"If the motor keeps pushing when something is wrong, it could injure your leg."
"So it stops."
"Yes."
"But if it stops while I'm walking, I fall."
"Yes."
Owen looked at the table.
"That's dumb."
Sam gave a small nod.
"Sometimes safety systems are designed around the wrong danger."
Nathan stopped chewing.
"What does that mean?"
"It means a company may have optimized protection against actuator overdrive without adequately accounting for what abrupt joint immobilization does to a pediatric user under load."
Nathan looked at me.
"Wouldn't they test that?"
"They should test foreseeable failure modes."
"Should."
Sam held up one hand.
"Do not turn my sentence into a conclusion I did not make."
Nathan dropped back in his chair.
"Fine."
Sam pulled another file onto the screen.
"The other thing is the update itself."
"What about it?"
"The package installed on Owen's unit has a build identifier not listed in the public release notes."
I felt my shoulders tighten.
"Internal build?"
"Maybe."
"Beta?"
"Maybe."
Nathan slapped the table softly.
"Stop saying maybe."
Sam leaned back.
"You want certainty before the evidence earns it."
"I want to know what they put on my son's legs."
"Then let me finish."
Nathan went silent.
Sam pointed to the build string.
"The version reported in your purchase documentation ends in 7C."
He moved to another field.
"The installed controller package ends in 7E."
"Two revisions newer?"
I asked.
"Not necessarily sequential."
"Was it approved for Owen's unit?"
"That's the question."
Nathan stared at the screen.
"Can StrideCore remotely install different builds on different customers?"
"Technically, yes."
"Legally?"
"Depends on what changed and how the device is regulated."
Nathan looked toward his phone.
Sam stopped him.
"Do not call Victor."
"I wasn't."
"You were touching the phone."
"I touch my phone for lots of reasons."
"Then touch it less dramatically."
Owen laughed.
Nathan looked betrayed.
"Whose side are you on?"
"Sam's."
"Unbelievable."
For a few seconds, the pressure broke.
Then Sam's expression settled again.
"There's more."
Nobody laughed after that.
He showed us a diagnostic flag associated with the March update.
It was not visible in the clinical interface.
"Adaptive gait profile experiment," I read.
Nathan's face emptied.
"What does experiment mean?"
"Could mean an internal designation."
"Could mean my son was part of a test."
"I did not say that."
"What else does experiment mean?"
Sam's voice stayed level.
"Software teams use ugly internal labels all the time."
Nathan pushed back from the table.
"That's not comforting."
"It's not supposed to be."
Owen looked at me.
"Was I a test?"
"I don't know."
He looked away.
This time the phrase felt cruel.
I reached across and rested my hand near his, not on it.
He moved his fingers until they touched mine.
Sam closed the laptop halfway.
"I need StrideCore's deployment records."
Miriam called before he could finish the sentence.
Her voice had changed.
She no longer sounded irritated.
She sounded careful.
"I got the Maryland complaint."
Nathan stood.
"What happened?"
"The child was eight."
Owen's fingers tightened around mine.
Miriam continued.
"The family alleged that a powered knee joint entered a protection state during assisted walking."
My stomach dropped.
"Same side?"
I asked.
"Left knee."
Nathan turned away from the table.
"Injury?"
"There was a fall."
"What injury?"
"A fractured wrist and facial laceration."
Owen released my hand.
Nobody looked at him.
Miriam said, "The complaint also alleges that the company initially characterized the event as therapist positioning error."
Sam looked up sharply.
"What company?"
"MedAxis Mobility."
He went still.
Nathan noticed.
"You know them."
Sam took off his glasses.
"StrideCore acquired MedAxis's rehabilitation division in 2023."
The silence that followed had weight.
Miriam said, "There's one more thing."
Nathan closed his eyes.
"Go ahead."
"The complaint identifies the incident date."
Nobody spoke.
"April seventeenth, 2022."
I looked at the anonymous email on the table.
22-0417.
Owen whispered, "That's the number."
Nathan gripped the back of a chair.
"What happened to the case?"
"Dismissed six months later."
"Settlement?"
"Not in the public record."
"Nondisclosure agreement?"
"Likely, but I don't know."
"Can you find the family?"
"I already did."
Nathan turned.
Miriam continued before he could speak.
"The mother is named Danielle Mercer."
"Where is she?"
"Annapolis."
"Call her."
"No, give me the number."
"No."
Nathan's face darkened.
"Miriam."
"Absolutely not."
"Why?"
"Because if she signed a settlement agreement, a direct approach from another customer could scare her, expose her, or put her in breach."
"Her kid went through the same thing."
"Allegedly."
"Stop talking like them."
Miriam's voice hardened.
"I am talking like the person keeping you from destroying useful evidence because you're angry."
Nathan stopped.
Owen stared down at his lap.
I could see the muscles working in his jaw.
Finally he asked, "Did they fix the other kid's robot?"
No one answered immediately.
That was enough.
He looked at the dark rehabilitation room.
Then at his father.
"I told you I didn't want to wear it."
Nathan's face changed.
"I know."
"No, you didn't."
"Owen—"
"You kept saying we had to give it another chance."
Nathan crouched beside the wheelchair.
"I thought—"
"You thought the machine knew better."
That landed harder than anything Victor had said.
Nathan reached for his son's arm.
Owen pulled away.
"I don't want to do therapy."
"Okay."
"I don't want anybody talking about the robot."
"Okay."
"And I want to go upstairs."
Nathan moved behind the chair.
Owen slapped his hands away from the push handles.
"I can do it."
Nathan froze.
Owen rolled himself toward the hall.
At the bottom of the stairs, he stopped because the stair lift required help positioning the chair.
May you like
He sat there for several seconds without turning around.
Then he said, very quietly, "I need help."
