The em-dash, a punctuation mark with a long literary history, is not a recent invention from Silicon Valley. Esteemed authors like James Joyce, Emily Dickinson, and Virginia Woolf have utilized its expressive capabilities. Despite its historical significance, early editors sometimes altered its usage, a practice later corrected by scholars. AI
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RANK_REASON The items discuss the history of the em-dash punctuation mark, with tangential mentions of AI and Silicon Valley, but do not present any new AI developments or research.