dialectic

noun

1. (countable, uncountable)Any formal system of reasoning that arrives at a truth by the exchange of logical arguments.
2. (countable, uncountable)A contradiction of ideas that serves as the determining factor in their interaction.

   “This situation created the inner dialectic of American history.”

3. (Marxism, countable, uncountable)development by way of overcoming internal contradictions

adj

1. Dialectical (of or relating to dialectic)
2. Dialectal (of or relating to a dialect).

   “Is it [prodezza] a mere dialectic variation of prudenza,[…]?”

   “[…] if any one has, in common discourse, an indistinct, hesitating, dialectic, or otherwise faulty, delivery, his Natural manner certainly is not what he should adopt in public speaking; […]”

   “But our able Secretary, Mr. Laidlay, has referred me to another alphabet, dialectic of the Hebrew, as set forth in the interpretation of the bilingual inscription of Thongga (Journal Asiatique, Fevrier, 1843) to which be conceives the characters of this brief specimen may be considered more properly to belong.”

   “[…] we have a theory sufficiently consistent with the remote philological relations traceable between Cymri and Gael, and with the close dialectic affinities between Celtic Scotland and Ireland.”