Punctuation / A Primer of Information about the Marks of Punctuation and their Use Both Grammatically and Typographically

by Frederick W. Hamilton

4. To avoid the confusion caused by a parenthesis within a parenthesis.

5. A single bracket is used to enclose the ending of a long line of poetry which will not fit the register and has to be run over into an adjoining line.

Doubt whether to use parentheses or brackets can usually be settled by this general principle:

Parentheses always enclose remarks apparently made by the writer of the text. Brackets enclose remarks certainly made by the editor or reporter of that text.

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THE INTERROGATION

The interrogation is the point that asks questions. It should always be placed outside quotation marks unless it is a part of the quotation itself.

Rules for the Use of the Interrogation

1. The interrogation point is used at the end of every direct question.