I would doubt that because books are probably weighed as higher quality and more trustworthy than random Reddit posts

Especially if it's unsupervised training

In my limited text generation experience, LLMs use em-dashes precisely like that, only without spaces on the sides and always in pairs in a single sentence. Here some examples from my Gemini history:

"The colors we see—like blue, green, and hazel—are the result of Tyndall scattering."

"Several interlocking cognitive biases create a "safety net" around the familiar, making the unknown—even if objectively better—feel like a threat."

"A retrograde satellite will pass over its launch region twice every 24 hours—once on a "northbound" track and once on a "southbound" track—but because of the way Earth rotates, it won't pass over the exact same spot on every orbit."

"Central, leverages streaming telemetry to provide granular, real-time performance data—including metrics (e.g., CPU utilization, throughput, latency), logs, and traces—from its virtualized core and network edge devices."

"When these conditions are met—indicating a potential degradation in service quality (e.g., increased modem registration failures, high latency on a specific Remote PHY)—Grafana automatically triggers notifications through configured contact points (e.g., Slack, PagerDuty)."

After collecting these samples I've noticed that they are especially probably in questions like explain something or write descriptive text. In the short queries there is not much text in total to trigger this effect.

> ”AI never uses em dashes in a pair”

I wish that were true, but I feel a little bit vindicated nevertheless

Not to mention "seriously", "really", "truly", "very", "verily", etc. There's a long history of using words related to truth as intensifiers in English.

> assume

There's your trouble. The real problem is that most internet users are setting their baseline for "standard issue human writing" at exactly the level they themselves write. The problem is that more and more people do not draw a line between casual/professional writing, and as such balk at very normal professional writing as potentially AI-driven.

Blame OS developers for making it easy—SO easy!—to add all manner of special characters while typing if you wish, but the use of those characters, once they were within easy reach, grew well before AI writing became a widespread thing. If it hadn't, would AI be using it so much now?

As someone who frequently posts online- with em dashes- I wonder if I am part of the problem with training llms to use them so much- and am going to get punished in the future for doing so.

I also tend to way overuse parenthesis (because I tend to wander in the middle of sentences) but they haven't shown up much in llms so /shrug.

If you’re judging my writing so shallowly, I don’t think I’m writing for you.