Advertising may be the most pervasive form of modern rhetoric, yet the discipline is virtually absent in rhetorical studies. This article advocates a mutually beneficial rapprochement between the disciplines--both in academe and the workplace. Rhetoric, for example, could help address an enduring lacuna in advertising theory. Persuasive communicators since Aristotle have maintained that rhetoric begins with invention, the generation of compelling ideas. Studies of advertising creativity hold that invention begins with the gathering of facts to fuel an association of disparate ideas at the heart of creativity. However, studies of the fact-gathering heuristic in advertising fail to identify a systematic approach for product analysis. In hopes of advancing a rapprochement between rhetoric and advertising, this article demonstrates that Aristotelian causal analysis, long associated with rhetorical invention, can provide a systematic heuristic for product analysis. Rhetoricians can help advertisers strengthen a crucial element--the invention phase--of advertising copywriting. (Contains 1 tables and 3 notes.)