A reader pointed out that in an earlier post “You could look it up,” I had made a mistake in this sentence: I recommend that everyone have a hardcover dictionary for their home office or student desk. I referred to “everyone,” which is singular, but used a plural pronoun, “their.” I should have used either a plural word, such as “folks,” (which is what I have changed it to, by the way), or a singular pronoun, “his.” Because we shy away from using masculine pronouns only, we might use “his or her.” Or we can recast the sentence and[.....]