She labeled each box with what she knew and marked the uncertain ones with question marks. The seat record: confirmed (green check). The cabin manifest: showed her as a minor traveling alone (true, but incomplete). The flight release: mismatched tail number (wrong). The aircraft registration: NQ-481 (true). The accommodation note: existed but invisible (true, but unsynced). Five boxes. Three truths, one error, one ghost. No wonder nobody could see the whole picture — the picture was scattered across five different systems that had never been introduced to each other.

The captain's second update included an approximate time for the next announcement, not for departure. Passengers responded more calmly to that distinction than Lena expected. A timeline for learning something was not a guarantee of what they would learn, but it gave them a small piece of structure. She drew another box in her notebook and labeled it CHECK AGAIN. Then she drew a dotted arrow back to the first box. The diagram wasn't part of the competition; nobody would award points for it. Yet she suspected it captured something important about the whole morning. When Marisol asked what she was drawing, Lena explained that the system needed a way to notice when its own answer had become stale. Her aunt studied the page with an approving smile. "That applies to people too," she said. "Especially the ones who are sure they're right." Lena glanced toward the cockpit door and decided she wouldn't have to say that aloud.

"Are we safe?" Lena asked.

"We're at the gate. The plane hasn't moved. They're checking before we go."

Lena's stomach tightened. Her balance disorder made uncertainty feel physical. She pressed her palm to the armrest and focused on a point on the wing. Outside, a baggage cart rolled past. Its yellow lights moved steadily through the rain.

Camille returned with water and a small paper bag. "For the nausea, if you need it."

"I don't feel sick yet."

"Keep it nearby."

"Do you know what happened?"

"I know we're waiting for an updated release. I don't know more than that."

Lena respected the answer. She opened her notebook, the one she used for robotics sketches, and wrote: Tail number and release number must match. Don't launch until checked. Then she drew two boxes with arrows between them.

A new message arrived from Mateo: The aircraft has been swapped on the schedule twice today. They may have attached the earlier release. It should be easy to confirm, but they must use the current record.

Lena looked at the two boxes she had drawn. She wondered how many other boxes were connected to this one — how many systems, how many screens, how many tired people making quick decisions. The seat record. The cabin manifest. The flight release. The aircraft registration. The accommodation note. The gate printer. The dispatch server. Each one correct on its own, each one telling a slightly different story. It was like the robot's sensors: individually reasonable, collectively wrong.

She drew a third box. Then a fourth. She connected them all with arrows, and the page began to look like one of Priya's system diagrams — the kind with so many lines it resembled a spiderweb. Marisol peered over her shoulder.

"That's either brilliant or a cry for help," her aunt said.

"Both," Lena said. "It's always both."

The captain and first officer reviewed the paper flight folder in the cockpit. The release sheet listed aircraft NQ-418. The plane at the gate was NQ-481. The numbers were close enough that a hurried person might read them as the same. The dispatch system showed a last-minute aircraft swap made forty minutes earlier, after a maintenance delay on the original plane.

In the cockpit, the check was a ritual as old as aviation itself: one pilot reads, the other verifies, and the airplane does not move until the two agree. Captain Cross read the release sheet aloud — "NQ-418" — and First Officer Park, whose cross-check habit had been drilled into her by an instructor who once told her that the most dangerous sentence in aviation is "that looks right," looked not at the sheet but at the aircraft identification plate by the door, and then at the gate display, and then back at the sheet. The numbers were close. That was the problem. NQ-418 and NQ-481 share three digits and a shape; on a printed form, in cockpit light, after a long duty day, a hurried eye can marry them without noticing the ceremony. Park had a personal rule for this exact trap, learned from a simulator session in which she had once, memorably, accepted