Comment by latexr
2 days ago
That’s not true at all. Apple’s OS by default have smart punctuation enabled and convert -- (two hyphens) into — (“em-dash”; not an “en-dash”, which has a different purpose), " " (dumb quotes) into “ ” (smart quotes), and so forth.
Furthermore, on macOS there are simple key combinations (e.g. with ⌥) to make all sort of smart punctuation even if you don’t have the feature enabled by default, and on iOS you can long press on a key (such as the hyphen) to see alternates.
The majority of people may not use correct punctuation marks, but enough do that assuming a single character immediately means they used an LLM is just plain wrong. I have never used an LLM to write a blog post, internet comment, or anything of the sort, and I have used smart punctuation in all my writing for over a decade. Same with plenty of other HN commenters, journalists, writers, editors, and on and on. You don’t need to be a literal machine to care about correct character use.
So we’ve established the default is a hyphen, not an em dash.
You can certainly select an em dash but most don’t know what it means and don’t use it.
It’s certainly not infallible proof but multiple uses of it in comments online (vs published material or newspapers) are very unusual, so I think it’s an interesting indicator. I completely agree it is common in some texts, usually ones from publishing houses with style guides but also people who know about writing or typography.
> assuming a single character immediately means they used an LLM is just plain wrong
I don't see anyone doing that here. LLM writing was brought up because of the writing style, not the dash. It just reinforces the suspicion.