Sullivan stepped forward. "Edward, sit down."
"Margaret, look at the board! She has propagated an error through three lines! This is exactly what I—"
Whitney looked at the sixth line. She saw the dropped coefficient. Her stomach dropped. Her hand began to shake.
She was 22 years old. She had slept three hours. She had not eaten since dinner the night before. She had $300 in her checking account and a grandmother who needed medication. And she had just made an error in front of two hundred people.
Walsh kept talking. She did not hear the words; she heard other words instead:
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She heard the guidance counselor in her junior year of high school who had suggested she consider a "more realistic" major.
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She heard the calculus teaching assistant who had graded her midterm twice just to be sure.
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She heard the admissions officer who had asked her if she was sure she wanted MIT.
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She heard the professor in her sophomore year who had told her after class that she "spoke very well for a girl from her neighborhood."
She heard every voice all at once.
Her hand stopped shaking; it went still. She set the chalk down on the tray.
The room read it as surrender. A long exhale went through the auditorium. Walsh stopped mid-sentence, the smile returning to his face. "Dr. Sullivan, by the terms—"
"Take a breath, Miss Tate."
The voice came from the back of the room. Dr. Whitmore was standing again. She had not approached the board; she had not raised her hand; she simply stood in her seat with her arms at her sides.
"Take a breath, and trust what you saw first."
Whitney did not turn around, but she heard it. She heard another voice on top of it: her grandmother's voice from a phone call six weeks earlier, when Whitney had cried into the receiver about a paper rejection: You don't owe them small, baby.
Whitney closed her eyes. She did not see the error on the board; she saw the equation as it had looked the moment she first walked up to it. She saw the entire structure: all four lines, all three substructures. And she saw what she had seen in the first thirty seconds—before the textbook methods, before her own substitution, before the obstacles, before any of it.