dialectic

US /ˌdaɪ.əˈlek.tɪk/
UK /ˌdaɪ.əˈlek.tɪk/
"dialectic" picture
1.

the art of investigating or discussing the truth of opinions

:
Socrates was a master of dialectic.
The philosophical discussion involved a complex dialectic.
2.

the existence or action of opposing social forces, ideas, etc.

:
The novel explores the dialectic between tradition and modernity.
Marxist theory is based on historical dialectic.