Veteran editors don't flag AI writing for incorrect grammar or em dashes. They flag it because of predictive convergence: uniform sentence lengths, frictionless passive assertions, and empty rhetorical signifiers.
Frequent unprompted tokens: delve, tapestry, testament, multifaceted, crucial, pivotal, beacon.
Human speech surges and rests (burstiness). AI defaults to a rigid 16–22 word rhythm with standard deviations below 5.5 words.
Final paragraphs opening with "In conclusion," "Ultimately," or "In summary," mechanically listing the previous points.
Empty throat-clearing clauses: "It is important to remember," "it is worth noting," "plays a vital role."
Artificial three-item parallel lists ("adaptation, practice, and dedication") without asymmetry or punchy punctuation.
Safe third-person omniscient voice devoid of personal doubt, specific errors, scars, or distinct sensory friction.
Every paragraph neatly bounded to 3 or 4 sentences, missing one-sentence punches or dense narrative blocks.
Habitual hyperbole: "transformative impact," "seamless integration," "game-changing paradigm."