A rhetorical question is a question that doesn't require an answer.
What's the name for a rhetorical device that's a non-question that requires an answer ?
Eg, in the following convo what role does "Say we did" play ?
Person A: "We could 'forget' to invite Steve."
Person B: "Say we did."
Person A: "If he came anyway, we'd know he wasn't a vampire."
My best guess is "implied question". In this case, it would expand to "Let's say we did, what would happen ?"
Can you think of any other examples ?
Note: there's "The opposite of a rhetorical statement" which is also looking for the "opposite" of a rhetorical question, but that is about requiring the listener to respond with a question.