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Comment by rs186 | Hacker News Reader

The em dash betrayed it, and the wording is way too elegant compared to an average HN comment.

It annoys me greatly that correct punctuation can be make your work look artificially generated.

Agree, saying that an HN comment is AI-generated just because it has an em-dash, is like saying a Twitter/BlueSky/etc post (or WhatsApp message, etc) is AI-generated just because it ends the sentences with a period.

"it looked like a real message but the dot at the end gave it away"

There are similar opinions with artists too. Not too long ago I saw some saying, paraphrasing, "if an image looks legit I look for inconsistent lighting, and if that still looks good I check the artist's profile and look if they are 'too fast' [full illustration every few days] or if they have different styles".

I haven't seen anything like that with code, but I wouldn't be surprised if someone said that human-written code is actually AI-generated just because the structure looks weird to the reviewer, or because it has some "what" comments (instead of "why" comments; both have their place), or things like that.

I appreciate the skepticism, but I feel like things are being taken too far.

Yeah but for educators, it may be a positive signal for plagiarism, as has always been the case.

So if you punctuate correctly, you get accused of plagiarism, but if you don't, then you get penalised for incorrect punctuation... I suppose school is meant to prepare you for life, so it makes sense.

Well, it's more like when you're teaching a class of immigrants or high schoolers, and some can barely put sentences together or use commas, but one of them submits a midterm paper that could have been written by Neil deGrasse Tyson.

Plagiarism has a long history, and the options are numerous, including using some other student's prior work, or paying a human "homework mill" overseas to research write your report for you. It's usually the differential in styles that will get you noticed, because a teacher gets to know their students and what they're capable of in the classroom.

Also, using a hyphen instead of an em dash isn't "incorrect"; it's a traditional way of writing, because most of us grew up with ASCII, and only the one key on our keyboards. Only a journalism or literature class would be concerned with teaching the distinction and marking points for using those.

I could list about 5-6 signals of LLM generation that I've noticed. Proceeding to investigations and accusations is discretionary, and shouldn't be taken lightly.

Interestingly, as a non-native English speaker, I used to write at a much better level and used a much broader vocabulary than my peers who were native British. My spoken English was very stilted, so presumably I'd have been accused of using AI if they had been around at the time.

that's why i stopped using capital letters!

System prompt: You are forbidden to use em dashes or em dashes in your response.

This doesn't work. ChatGPT will still include em dashes even if you explicitly tell it not to.

Certainly! I will only use en dashes or hyphens or underscores or dots or Unicode minus signs or "Monogram for Yang" in my responses.

Are there any other glyphs you'd like to prohibit?

[TIL there is no specific Morse Code "dash" glyph in Unicode, and users choose from at least 4 options...]

Me make sure to sprinkly my posts with Grammattical and speling errrs

> The em dash betrayed it

I think that's false. Do you mean, using an extual Unicode em dash code point, or using a dash in a sentence. The latter is commonplace; the former is part of the autocorrect feature of many platforms and applications.

> the wording is way too elegant compared to an average HN comment

Statistically, it's apparently about average. :)

Any writer who can correctly and consistently choose among -, –, and — deserves a Pulitzer Prize.

I don't really deserve a Pulitzer, but thanks! :) Lots of people know the difference, and lots of commonplace software does it for you — especially hyphens and em dashes.

There was a thread on HN in the last few months. Here's a quick, general guide:

* Hyphens join things into one term: sun-bleached

* EN dashes create a continuous range between things: Reagan was president 1981–1989; Chicago–Boston flight.

* EM dashes create a break between things: What the—?; I was walking — my car was out of gas — when I saw the accident.

But realistically, hyphens are used for all three, because that's the only one that can be typed with a single key.

Unicode and word processors ("desktop publishing") have brought us to the point of being our own typesetters.

Talk about losing jobs: in the past, a document could go from a verbal dictation to a scribe taking notes, to an editor for redactions, to be set in movable type, and printed on a press.

Now it’s up to one person with a computer to do it all, and our scope and definition of literacy has expanded.

Someone writing a manuscript doesn’t have 3 different dashes: they just draw a line, short or long. Typewriters had a hyphen key only.

Maybe we can go back to "two spaces after each period".

But you can see em dashes everywhere (it's harder to distinguish en dashes). As I said above, plenty of software - very popular software such as Microsoft Word and phone keyboards - inserts em dashes automatically or when you type two hyphens.

Also, throughout history I doubt everyday people thought about using em, en or hyphen. It's a detail known by professionals, like things professional chefs or coders do that amatuers don't.

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