"The enthymeme is a sort of syllogism, and the
consideration of syllogisms of all kinds, without distinction, is
the business of dialectic, either of dialectic as a whole or of one of
its branches.

dialectic E dialetik < OFr dialetique < L dialectica (ars) < Gr dialektikc (technc), the dialectic (art) < dialektikos: see DIALECT6
1 [often pl.] the art or practice of examining opinions or ideas logically, often by the method of question and answer, so as to determine their validity
2 logical argumentation
3 [often pl.]
a) the method of logic used by Hegel and adapted by Marx to observable social and economic processes: it is based on the principle that an idea or event (thesis) generates its opposite (antithesis), leading to a reconciliation of opposites (synthesis) b) the general application of this principle in analysis, criticism, exposition, etc.
adj.
DIALECTICAL