The Editorial Board Argues Over 'Mercurial'
The student newspaper editorial board is editing a sports column. The sentence reads: “The coach’s mercurial mood swings-cheerful at Monday’s practice, icy by Wednesday, joking again after Friday’s loss-made every game plan feel provisional.” The adviser asks the board to replace “mercurial” with one of four words: unpredictable, gloomy, generous, rapid. One editor says “mercurial” must mean “fast” because mercury is a quick-moving metal. Another says it means “gloomy” because the sentence mentions an icy mood. No dictionary or internet is allowed. The replacement must keep the sentence’s contrast between changing moods and provisional plans, and it must fit all three examples in the dash. The board must also explain why the other candidates are weaker and how a single added context clue could change the answer.
1. Which replacement word is best, and which context clues carry the decision?
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Best replacement: unpredictable. The dash supplies three contrasting moods inside one week-cheerful Monday, icy Wednesday, joking Friday-so the word must name changeability, not a single mood. “Mood swings” reinforces that the coach’s state moves back and forth. “Provisional” also fits: plans feel temporary because the coach’s disposition keeps shifting. “Gloomy” explains only the icy Wednesday moment and ignores cheerful and joking. “Generous” has no support at all. “Rapid” is the strongest distractor because mercury is associated with speed, but speed is not the same as variability; nothing says the changes happen quickly. The context, not the metal’s nickname, controls.
2. Why is “rapid” tempting, and what minimal change to the sentence would make it defensible?
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“Rapid” is tempting because the word “mercurial” contains “mercury,” and mercury is a fast-moving liquid; also, “mood swings” can suggest quick shifts. But the sentence’s three examples are separated by days, not minutes, and the emphasis is on inconsistency rather than speed. To make “rapid” defensible, the sentence would need explicit timing: for example, “The coach’s mercurial shifts-cheerful before lunch, icy by the first drill, joking by the second-made plans feel provisional.” Even then, the sentence would be testing speed only if “rapid” were contrasted with slow, not with steady.
3. Write a new context sentence that supports “mercurial” as “changeable” without using a synonym.
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“Her mercurial preferences moved from vanilla to pistachio to plain chocolate within one afternoon, so the caterer stopped taking her first answer seriously.” The sentence never says “changeable,” but the rapid sequence of different preferences plus the caterer’s reaction forces that meaning. A strong answer should include at least two contrasting states and a consequence, which is exactly how the original dash works.