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Is the em dash used in formal writing?
Is it valid to use em dashes in formal writing? My teacher said it's informal to use em dashes under any circumstances, so I just wanted to make sure. I've gone through several related questions in here but there is no direct answer. This was my sentence: 'In fact, as shown in latest statistics, 12.5% of America’s citizens are African Americans—who most of them are descendants of enslaved people—and they are all treated equally.' It was in a paragraph about slavery.