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How to Use Em Dashes (–), En Dashes (–), and Hyphens (-)

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650 points Stratoscope | 1 comments | 27 Mar 25 20:19 UTC | HN request time: 0.204s | source
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A_D_E_P_T ◴[27 Mar 25 20:41 UTC] No.43497927[source]▶
AFAIK most computer keyboards don't have em dashes. Rather than hit ALT+0151 every time, I've always just strung along two hyphens, like: --

Absolutely proper and correct use of em dashes, en dashes, and hyphens is, to me, the most obvious tell of the LLM writer. In fact, I think that you can use it to date internet writing in general. For it seems to me that real em dashes were uncommon pre-2022.

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mkehrt ◴[27 Mar 25 21:04 UTC] No.43498153[source]▶
I always use an em dash when possible when I should, and double en dash when I can't, just because I'm that kind of nerd. But it is the case that a double en dash on iOS autocorrects to an em dash, so I'm suspicious of the claim that em dashes are a tell for LLM writing.
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mmooss ◴[27 Mar 25 23:16 UTC] No.43499350[source]▶
Why not a double hyphen, which has the same result?
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1. lxgr ◴[28 Mar 25 00:43 UTC] No.43500031[source]▶
Not in all fonts. In most monospace fonts, two hyphens will show with a small gap between them, for example.

I also personally prefer en dashes, surrounded by whitespace on both sides, over em dashes. Apparently some WYSIWYG software interprets two hyphens as an em dash, while other will interpret that as an en dash, so I'd rather just use the real thing if possible to avoid the ambiguity.