Dictionary publisher Merriam-Webster has compiled information on the usage of the em dash (—), en dash (–), and hyphen (-) in English writing. Em dashes function like commas, colons ...

"I - keep - seeing - weird - long - dashes - in - posts," wrote a LinkedIn user on her page several months ago. "Yes, this is ...

For consistency in University writing do not include spaces. An em dash is the width of the letter "m" in the font and type size being used, and should never be used in place of an en dash or hyphen.

And that’s likely why it’s become a so-called “tell.” The em dash is ChatGPT’s default dash. Probably because it was trained ...