Parentheses

Definition and stakes

William Livingston Klein,  Why We Punctuate; or, Reason Versus Rule in the Use of Marks

“ Those who adopt the English style apparently always use the commas when the matter within parentheses or brackets falls within the sentence, even though the relation between what follows and what precedes the parentheses or brackets does not require a comma. We consider such punctuation bad, for it appears to treat the matter so enclosed as both slightly and wholly parenthetical. Our next example (No. 6) , a quotation, illustrates this point.
5. We do not know why “Tristam Shandy” takes marks of quotation (single marks in the example) , while the names of the other books take none.
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Source: Gutenberg

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