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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Apparently independently invented by several people, including Don Rickter. The pronoun appeared in the Unitarian Universalist publication UU World on May 1, 1973, and Mario Pei gave Rickter credit on page 145 of his book Weasel Words (1978).
xenon, atomic number 54
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Classic usage
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