The Order of the Lessons

The robot dog was named Biscuit by whoever donated it, and Biscuit could not climb stairs.

"Again," Maya said.

Soren tapped the screen. Biscuit lurched at the bottom step, lifted one leg too high, and toppled sideways with a sound like a dropped toolbox.

"That's eleven," Soren said. He wrote the number down. "Eleven falls. Same fall every time."

The maker space was nearly empty on a Sunday. The volunteer who ran it, a woman named Priya, was across the room arguing happily with a three-D printer that had jammed. She had handed them Biscuit and a laptop and said, the training files are all there, good luck, and then forgotten about them completely.

"The files are fine," Maya said. She had read them twice. "Somebody already taught it to walk. Look, it walks great."

It was true. On flat ground Biscuit trotted, turned, even did a little spin. It just could not do stairs.

"So we give it stairs," Soren said. "More stairs. We train it on the staircase a thousand times until it figures it out."

They did. They ran it for an hour. Biscuit fell ninety more times. It got worse, if anything. It started flinching at the bottom step before it even touched it.

Maya stopped the program. She sat back on her heels and stared at the staircase, then at Biscuit, then at nothing.

"It's scared of the whole staircase," she said.

"It's a robot. It's not scared."

"I know it's not scared. But that's what it's doing. It sees the whole staircase and it panics and throws all its legs at once." She frowned. "It never learned the easy part."

"There's no easy part. It's a staircase."

"There's one step," Maya said.

Soren looked at her.

"One step," she said again. "Just one. Off the floor onto one step. That's basically walking. It already knows walking."

Soren thought about it. He pulled a single thick board out of the scrap bin, the kind they used for shelving, and laid it flat on the ground. Not even a step. A bump.

"Start it on that," he said. "One bump."

They rewrote the lesson. Instead of pointing Biscuit at the staircase, they pointed it at the board on the floor. Step up onto a board half an inch high. That was the whole assignment.

Biscuit did it on the third try. Then it did it eleven times in a row.

"Okay," Soren said, and his voice had changed. "Okay. Now make it taller."

They propped the board on a pencil. One inch. Biscuit wobbled, learned, climbed. They propped it on two pencils. Then a block. Then a real single step, alone, with nothing above it.

Biscuit climbed the single step like it was nothing.

"It's the same legs," Maya said. "The same motors. The same everything. We didn't change Biscuit at all."

"We changed the order," Soren said. He was writing fast now, the pencil scratching. "We gave it the easy one first. The exact same hard thing is still coming. But now it's not the first thing it sees."

They added a second step. Biscuit hesitated, then climbed both.

Maya leaned forward. "Wait. Do the math on this. When it was falling before, what was it actually learning?"

Soren stopped writing.

"Ninety falls," Maya said slowly. "We thought we were teaching it stairs. But every single time it fell, it was learning something. It was learning that stairs mean falling. We taught it that. Really well. Ninety times."

"That's why it got worse," Soren said.

"That's why it got worse. We weren't failing to teach it. We were teaching it the wrong thing, perfectly."

Across the room Priya got her printer unjammed and made a small triumphant noise. Neither of them looked over.

Soren set down the pencil. "So the order isn't just, like, easier on the robot. It's not about being nice to it."

"No."

"The order changes what it actually ends up knowing. Two robots. Same body, same brain, same staircase. Show one the hard part first and the easy part later, and the other one the easy part first." He looked up. "They don't end up the same. They end up being different dogs."

"Different dogs," Maya said. "From the same lessons. Just in a different order."

They put the whole staircase in front of Biscuit. Four steps.

Biscuit climbed the first. Set its weight. Climbed the second. The third. It reached the top step and stood there, all four feet on the landing, doing the small foolish spin it did when it was pleased with itself on flat ground.

Maya did not move for a second.

"Soren," she said. "My whole life people tell me I learn things in the wrong order."

He knew what she meant. She jumped ahead, she skipped the boring middle, she asked the end question before the beginning one. Teachers wrote it on her reports like a flaw.

"Biscuit fell ninety times because of the order," she said. "Not because it was a bad dog. Because nobody gave it the one step first."

Soren looked at his notebook, at the column of numbers, eleven and ninety and three, the falling and the climbing all in his own handwriting. He thought about every class that had started with the hard thing, and every time he had decided he was the kind of person things did not work for.

"Maybe we weren't bad at it either," he said.

"Maybe we just got the steps in the wrong order."

They were quiet. The idea was bigger than Biscuit and they both felt it stretching out. Every lesson anyone had ever been given, in some order. And the order changing what they became.

"We could test it," Soren said finally. "Wipe Biscuit. Teach a fresh one the hard way on purpose and a fresh one the easy way. See if they really come out different."

"They will," Maya said.

"I think so too. But I want to see it."

Maya reached up to the top of the staircase and lifted Biscuit down, setting it back on the floor at the very bottom step, where it had failed ninety times in a row that morning.

She pressed start.

Biscuit looked at the staircase, lifted one careful foot, and climbed.