Dialectic
Truth pursued through disciplined question and answer — the way Socrates cross-examined Athens.
Dialectic is a method of reasoning developed most famously by Plato and his teacher Socrates, in which two speakers engage in question-and-answer exchange to move beyond initial assumptions toward deeper truth. Rather than accepting beliefs as fixed starting points, dialectic treats them as hypotheses to be tested and refined through rigorous dialogue. The method relies on reason alone, setting aside sensory perception and everyday opinion in favor of logical examination.
In practice, dialectic works by having one participant question another's claims, forcing them to recognize contradictions or limitations in their thinking. Through this back-and-forth process, the speakers gradually ascend from lower, confused understandings toward higher principles and ultimate truths. Plato valued dialectic as the most powerful philosophical tool available, capable of moving beyond mere hypotheses to reach first principles that require no further justification, making it superior to other forms of inquiry that remain trapped in assumption and partial knowledge.
Where this idea shows up
75 Greek sourcesWhere to read it
- Fragments & Testimonia465 BCEZeno of Elea· Elea
- Protagoras385 BCEPlato· Athens
- Euthydemus384 BCEPlato· Athens
- Lesser Hippias375 BCEPlato· Athens
- Parmenides370 BCEPlato· Athens
- Theaetetus369 BCEPlato· Athens
- Memorabilia354 BCEXenophon· Athens
- Alcibiades 1348 BCEPlato· Athens
- Lovers348 BCEPseudo-Plato· Athens
- Greater Hippias348 BCEPlato· Athens
- Hipparchus348 BCEPseudo-Plato· Athens
- De sophisticis elenchis322 BCEAristotle· Chalcis
- Analytica priora322 BCEAristotle· Chalcis
- Metaphysics322 BCEAristotle· Chalcis
- Nicomachean Ethics322 BCEAristotle· Chalcis
- Eudemian Ethics322 BCEAristotle· Chalcis
- De Inventione84 BCECicero· Formiae
- On Oratory55 BCECicero· Formiae
- De Republica54 BCECicero· Formiae
- Cicero· Formiae
- Tusculanae Disputationes43 BCECicero· Formiae
- Institutio Oratoria95 CEQuintilian· Rome
- Discourses108 CEEpictetus· Nicopolis
- Platonicae quaestiones120 CEPlutarch· Chaeronea
- Plutarch· Chaeronea
- Plutarch· Chaeronea
- Quaestiones Convivales120 CEPlutarch· Chaeronea
- De Pythiae oraculis120 CEPlutarch· Chaeronea
- Noctes Atticae180 CEAulus Gellius· Rome
- Vitarum auctio180 CELucian of Samosata· Samosata
- Juppiter Tragoedus180 CELucian of Samosata· Samosata
- Hermotimus180 CELucian of Samosata· Samosata
- Anacharsis180 CELucian of Samosata· Samosata
- Symposium180 CELucian of Samosata· Samosata
- Lucian of Samosata· Samosata
- De saltatione180 CELucian of Samosata· Samosata
- De Domo180 CELucian of Samosata· Samosata
- Demonax180 CELucian of Samosata· Samosata
- Adversus Mathematicos190 CESextus Empiricus· Alexandria
- Pyrrhoniae Hypotyposes210 CESextus Empiricus· Alexandria
- Deipnosophistae230 CEAthenaeus of Naucratis· Naucratis