rhetorical
adj.adj. describing a question that you ask just to make a point, not because you want an answer. It can also describe a style of speaking or writing that is meant to impress or persuade people.
adj. relating to the art of persuasion through language; specifically describing a question asked for effect rather than to elicit information. Often used to describe formal or elaborate styles of discourse.
He asked a rhetorical question that nobody needed to answer.
The politician used several rhetorical devices to make his speech more memorable and persuasive to the voters.
The essay was filled with rhetorical flourishes that, while stylistically impressive, ultimately failed to address the core logical fallacies of the author's primary argument.
From Middle English rethorycal, rethoricalle, rethorycall, from rethorik, rhetoric (noun) or Latin rēthoricus, rhētoricus, from Ancient Greek ῥητορικός (rhētorikós, “concerning public speaking”). By surface analysis, rhetoric + -al.
Typically used attributively before a noun like 'question', 'device', or 'flourish'.