rhetorical question
Definition - A question that is asked either to produce an effect or to make a statement, but not to obtain an answer.

Example -
Who cares?


1. Rhetorical questions should be terminated with a question mark, because they ARE questions.

Etymology -
The word rhetoric derives via French and Latin from the Greek rhetorike techne, the orator's art (from rhetor, orator).

Oxford English Dictionary -
The phrase's first citation is from 1843:
"Non is often used without ne in vehement questions, especially, of course, questions of appeal, or, as Reisig calls them, rhetorical questions."
(T. K. Arnold, Latin Prose Composition, page 442)

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