For over five centuries, it was just punctuation.

Then, almost overnight, the em dash acquired a new meaning. Not grammatical. Social.

It became evidence.
Or at least, what people mistook for evidence.

If a sentence contained an em dash, someone would inevitably appear in the comments to announce that it had been written by AI. A punctuation mark had somehow become a fingerprint.

The irony is difficult to miss. The em dash predates computers by generations. It survived typewriters, newspapers, and publishing houses long before language models existed. Yet now it finds itself standing trial for a crime committed by statistics.

The observation itself is not entirely wrong.

Large language models do use em dashes frequently. They learnt from books, journalism, essays, and carefully edited prose—places where the em dash has always been perfectly at home. They simply inherited it from the people who taught them to write. Ask an AI to write something thoughtful, and chances are it will reach for one.

That is a correlation, but somehow, the internet promoted it into certainty.

The logic quietly shifted: AI often uses em dashes.
became: Anything using em dashes must be AI.

The leap is obvious once written down, yet it happens constantly. It is the same mental shortcut behind countless mistaken conclusions.

Programmers often wear glasses.
Not everyone wearing glasses is a programmer.

Luxury watches are popular among successful executives.
Owning one does not make someone successful.

The pattern exists.
The conclusion does not.

Humans are remarkably good at spotting patterns, and remarkably willing to overextend them.

This is hardly the first time.

When Photoshop became mainstream, people started inspecting reflections, shadows, and impossible lighting.

When AI image generators arrived, everyone became an expert on hands and fingers.

Now that text generators are everywhere, readers search for suspicious words, suspicious phrases, suspicious punctuation.

The technology changes.
The instinct remains the same.
Every era invents its own tell.

What I find amusing is that the backlash is beginning to shape human writing. People begin adapting—not because the tool changed language, but because social perception did.

That’s fascinating, because punctuation almost never becomes a cultural symbol. Words do. Emojis do. Fonts occasionally do (remember Comic Sans). But punctuation? That’s rare.

Good writing has always used punctuation as a tool for rhythm, emphasis, transitions, and structure. Every punctuation mark exists for a reason—the em dash included.

Now, writers quietly remove em dashes. They deliberately replace semicolons with periods. They avoid perfectly ordinary words because someone declared them ‘AI vocabulary’.

That’s a strange reversal. Instead of AI learning from human style, humans start editing themselves around AI stereotypes.

Imagine if we time-travelled and told this to a copy editor from 2011:
“People stopped using the em dash because strangers on the internet might think they used artificial intelligence.”
They’d probably stare at you for a few seconds and say, “It’s just punctuation.”

That absurdity is precisely what makes this observation interesting. It’s not really about the em dash. It’s about how quickly symbols acquire new social meanings.

If AI’s existence convinces people to abandon a useful punctuation mark out of fear of being mistaken for a chatbot, then AI hasn’t changed grammar—it has changed social signalling.

Yesterday: em dash = good typography.
Today: em dash = maybe AI.
Tomorrow: something else entirely.

Language hasn’t changed. The social interpretation has.
Not because the writing became worse, but because they do not want to be mistaken for a machine.
Technology is not shaping grammar directly, but it is shaping what humans feel permitted to write.

There is something almost poetic about it.

Artificial intelligence was trained on human writing.
Now humans are editing themselves in response to artificial intelligence.
The copy begins influencing the original.

Perhaps this says less about punctuation than about us.
We are uncomfortable with uncertainty.

Simple rules feel safer than a nuanced judgement.
“Contains an em dash.” > “Must be AI.”
Case closed.

Reality, as usual, refuses to cooperate.

Writing has always relied on rhythm, pause, emphasis, and flow. The em dash is merely one instrument among many. Used well, it creates movement that commas cannot and periods should not.

It is not an AI invention.
It is typography doing its job.

And if you start using em dashes more often out of mild rebellion, you’d be participating in another familiar cultural cycle: whenever something ordinary becomes stigmatized, someone inevitably reclaims it. Not because they need to—but because they’re resisting the idea that social perception should dictate legitimate expression.

That’s a much stronger reason than simply liking a punctuation mark. It’s a small way of saying, “I’m going to write the sentence the way the sentence wants to be written.” And that’s probably the healthiest response to the whole trend.

So no, I will not be retiring the em dash. Not because AI uses it. Because I see little reason to surrender perfectly good punctuation to a statistical misunderstanding. If abandoning it is the price of looking human, I’d rather keep writing like myself.