Marketplace Tech Marketplace Tech

AI loves negative parallelism

Aug 24, 2026 · 9m

Summary

Marketplace Tech host Megan McCarty Carino interviews Will Oremus about "negative parallelism," a rhetorical structure like "it's not X, it's Y" that has become a telltale sign of AI-generated text. They discuss how this pattern emerged from training data and is amplified by models using synthetic data, creating a verbal watermark for AI writing. The conversation also explores the concerning trend of humans beginning to mimic these AI linguistic habits.

Topics discussed

Odoo ad and intro to AI writing tells Defining negative parallelism in AI text Evolution of AI writing tells: delve and em dashes Why AI favors negative parallelism: risk avoidance Sponsors: Raymond James and Wise Synthetic data training amplifies AI quirks Verbal watermarks and humans mimicking AI Marketplace listener survey and closing
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