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.