Definition - A figure of speech where something is asserted by asking it as a question.

Example -
Why are you such an asshole?

Etymology -
The word means "to question" in Greek.

Oxford English Dictionary -
Its first citation is from 1589:
"Erotema … This figure I call the Questioner."
(Puttenham Eng. Poesie iii. xix. (Arb.) 220)

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