Grammar rules are an invention. It’s time to stop taking them so seriously.

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Once upon a time, there were no grammar rules and writers were free to experiment with punctuation as they saw fit. It wasn’t until the late 1700s that grammar books became popular (and lucrative), and the rest is history. Cecelia Watson, author of “Semicolon: The Past, Present and Future of a Misunderstood Mark,” joined THINK to discuss.