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epistemology

The Topics / Commonplaces

τόποι

The orator's idea-bank: ready-made lines of argument — from cause, from opposites, from precedent — you can apply to any subject to find something to say.

The topics, or τόποι, are standard starting points and argument patterns that speakers and writers can use across many subjects. Aristotle developed this system as a toolkit for constructing persuasive arguments in rhetoric and dialectic. Rather than inventing entirely new reasoning each time, an orator could draw from these established commonplaces—general heads or templates applicable to law, politics, physics, and other domains. Some topics were universal, working for almost any argument, while others were specific to particular fields.

The practical value lies in reliability and efficiency. A speaker arguing a legal case could turn to topics suited for legal matters, just as one discussing natural philosophy would use different but equally structured approaches. By mastering these templates, anyone could generate plausible arguments without needing deep expertise in every subject. This democratized rhetoric, making persuasion a learnable skill rather than an inborn talent, and it remained central to education throughout the ancient world and beyond.

Where this idea shows up

43 Greek sources

Where to read it