From Greek 'dialektike' (art of debate) — reasoning as conversation, truth discovered through exchange of arguments.
The art of investigating the truth of opinions through logical discussion; a method of argument involving contradictory propositions (thesis and antithesis) resolved through synthesis.
From Old French 'dialectique,' from Latin 'dialectica,' from Greek 'dialektikē (technē)' (διαλεκτική τέχνη), meaning the art of debate or discussion. The Greek adjective 'dialektikos' derives from 'dialektos' (dialogue, discussion), from 'dialegesthai' (to converse, discuss), composed of 'dia-' (through, between) and 'legein' (to speak, choose, gather), from Proto-Indo-European *leǵ- (to gather, collect). The method was central to Socratic and
The PIE root *leǵ- (to gather) behind 'dialectic' also produced 'logic' (gathering reasoning), 'lexicon' (gathering of words), 'lecture' (a reading/gathering), 'legend' (something to be gathered/read), and 'legal' (what has been gathered as binding). Dialectic, logic, and law are all forms of 'gathering' — collecting arguments, words, or rules.