5. Using “that” instead of “who” as a pronoun to refer to a person: I admit, I always thought this was a hard and fast rule. You would say, “That crazy lady who is writing about grammar,” not “That crazy lady that is writing about grammar,” right? The SAT and ACT actually test students on this very point. (That’s not to say that the SAT and ACT are the authority on proper grammar, but hey, this is what folks are told is college-ready grammar.) So I was surprised to read in Patricia T. O’Conner’s grammar primer Woe is I: The Grammarphobe’s Guide to Better English in Plain English that either form is correct. Apparently, this is one of this is more a question of style than of rules.
Personally, I’ll continue to favor “who” when referring to people. (Sorry, people whose work I copyedit!) But at least I’ll recognize that it’s a stylistic choice rather than a firm grammatical rule.
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