Mystery Monday: Purloined Persuasion, Part I

Her case was most original, unique
And sure to put competitors to shame.
No one had found her angles, none would seek
Her sources. This would earn her lasting fame
In high school-aged debating circles where
She'd grown to adolescence. Soon her chance
To hit the circuit with it came. With care
She'd even memorized her first speech. Lance,
Carruthers, her opponent, won the toss,
Though, so he got to choose just who'd
Go first. He rose, and soon his wit and gloss
Had her in tears; indeed, she might have booed!
His ev'ry word was copied! How had he
So robbed her? 'Twas not over! Ne'er would be!