A single one is sufficient evidence that calling out a single em-dash as evidence of AI use is flawed. Especially when it is from the same magazine.

There are also em-dashes in a huge number of their articles. I didn't spend time picking one. I just went back to the oldest article in the first category I picked, and found one on the first try. It's a common style for more "serious" magazines and always has been.

> Thinking that LLMs have a lot of em-dashes because works in the wild have a lot of em-dashes is like thinking that LLM output has a lot of emoticons because a lot of essayists use emoticons to mark subject divisions in the text.

No, thinking they do is like having read a lot of literary text and being aware of how it has a long history of being used in serious writing.