Definition
Rhetoric is the study and practice of persuasive communication: how a speaker or writer uses language to convince an audience of something. In debate, rhetoric is not a substitute for evidence and reasoning, it is the delivery layer that makes evidence and reasoning land with a listener. Aristotle's classical framework divides persuasive appeal into three modes: ethos (credibility), pathos (emotion), and logos (logic), which remain the standard vocabulary for analyzing persuasive speech today.
Example
The same factual claim, "this policy will save lives," can be delivered in very different rhetorical registers: a dry recitation of statistics (logos-heavy), a personal story about someone affected (pathos-heavy), or a speaker establishing why their professional background makes them trustworthy on the subject (ethos-heavy). A strong debate speech usually blends more than one mode rather than relying on a single appeal.
Common mistakes
Debaters sometimes treat "rhetoric" as an insult, meaning empty or manipulative talk, which is a narrower, negative colloquial usage. In the formal sense used in debate education, rhetoric is a neutral, necessary skill: a well-reasoned argument delivered without any rhetorical craft often fails to persuade a live audience, even when the underlying logic is sound.