External difference and dialectical opposition are categorically distinct relations

Evidence

But this kind of distinction (black is not white) is everything but “the same” as an opposition that depends on its opposite in its very being (black people are not white people) and must thus be analyzed in terms of a dialectical conceptuality in which the central notion of contradiction — which has no equivalent in analytic systems — still reigns supreme. — Fredric Jameson, Postmodernism, or, The Cultural Logic…, 741

Categorization

• DEFINE: A precise, load-bearing distinction between inert extrinsic difference and dialectical contradiction — exactly the kind of definitional clarity the reader needs for explaining postmodernist theory.
• XREF: The ‘black is not white’ vs ‘black people are not white people’ pairing is a compact example of a dialectical conceptuality that has no analytic equivalent — useful for the reader’s cognitive map of theory concepts. — connects to: The quality’s inner figure-ground relation differs from the this-world relation