Barnacle
The first number sticks
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Barnacle stuck to things. It was what barnacles did, and he was very good at it.
He was a small, round barnacle-tween with a pale shell like a stack of tiny pebbles, a sky-blue scarf and a curious face that peeked out of the top. He spent his afternoons clinging to the side of the old pier at the bottom of the BiasForge lab, watching visitors try the experiments.
Today a young seal was trying the spinner one. The spinner clattered round and stopped on a big painted 65. Then the card asked: how many countries are there in Africa?
"Um," said the seal. "Sixty? Fifty-eight? Somewhere near sixty-five, probably a bit less."
The answer flipped over: 54.
"Oh," said the seal, frowning. "But the spinner said 65."
Barnacle wiggled with delight. "The spinner said 65," he agreed, "and the spinner knows nothing about Africa. It's just a spinner. But it got there first, and once a number gets into your head first, it sticks." He tapped his own shell. "Like me."
Barnacle had not always noticed when a number stuck to him.
When he was small, he believed the first number he heard about everything. A shop sign said a scarf was "reduced from 40 to 25," and he thought 25 was a bargain, without ever wondering whether the scarf had ever really been worth 40. A friend guessed there were "about a hundred" marbles in a jar, and Barnacle's own guess came out ninety, though when they counted there were thirty-one.
One day he lost a guessing contest at the fair because the person ahead of him shouted a silly huge number, and Barnacle's guess, without his even noticing, came out huge too. He felt foolish, and a little cross, because he'd been so sure his guess was his own.
Solon, the mentor at the lab, found him clinging miserably to the pier. "Your guess was pulled," Solon said gently. "Everyone's is. Scientists have seen it again and again: a number you've just seen drags your estimate toward it, even a number from a spinner." Solon sat beside him. "It isn't a flaw in you. It's how fast brains work. The trick is a question. Before you guess, ask: is that number evidence, or is it just the first thing in the room?"
Barnacle started asking the question. At the shop: was the scarf ever really 40? At the marble jar: was the hundred a count, or a shout? At the fair, the next year, someone ahead of him shouted an enormous number again, and Barnacle smiled, set it aside, and started from what he actually knew: how big the jar was, how big a marble was. His guess was the closest of anyone's.
He came to work at BiasForge after that, because it was a place for catching tricks like this one.
"What's your job?" Solon asked him on his first day.
"I'm the one who sticks," Barnacle said. "So visitors can see what sticking looks like, and learn to ask the question."
Whim, the fast, cheerful part of everyone's thinking, laughed. "I always grab the first number."
"I know," said Barnacle fondly. "That's why I'm here."
The young seal came back later with a new card from the lab: a toy price. "It says it's usually 80 coins," she said, "and today it's 50. That's a great deal, right?"
Barnacle peeked out of his shell. "Ask the question," he said.
The seal thought. "Is 80 evidence? Or just the first number I saw?" She frowned. "I don't actually know if anyone ever paid 80."
"So what would you check?" Barnacle asked.
"What the same toy costs somewhere else," the seal said slowly. "Or what I'd pay if nobody had said 80 at all."
Muse, the slow, careful part of everyone's thinking, gave a pleased little nod from the doorway. That was exactly the move.
At closing time, the seal lingered by the pier.
"Does it bother you," she asked Barnacle, "being the one who always sticks?"
Barnacle thought about the fair, and the huge shouted number, and how sure he'd been that his guess was his own.
"It used to," he said. "I thought sticking meant I was gullible. Now I think everybody sticks a little, and the people who don't get fooled are the ones who notice." He wriggled loose from the pier, just for a moment, and floated free in the water. "And there's this lovely feeling when you notice. A little click. Like letting go of something you didn't know you were holding. My thinking gets clear and light, and then I start again from what I actually know."
He settled back onto the pier, and the seal grinned, and Barnacle could see she had felt the click too.
The BiasForge ensemble
Barnacle is one of the friends in BiasForge. Each friend shows you one idea by how they act; meet them all and you have the whole subject.
