Splitting praxis into sociology and metaphysics erases the dialectic.

Evidence

The absence of any treatment of the dialectic could have two origins. The first of these would be the fact that philosophy of praxis is envisaged as split into two elements: on the one hand a theory of history and politics conceived as sociology—i.e. one that can be constructed according to the methods of natural science (experimental in the crudest positivist sense); and on the other hand a philosophy proper, this being philosophical alias metaphysical or mechanical (vulgar) materialism. — Antonio Gramsci, Selections from the Prison Notebooks, 1546

Categorization

• DEFINE: Positivist sociology and mechanical materialism are defined as the two poles left when dialectic—the unifying method of philosophy of praxis—is stripped out.
• XREF: connects to: Structuralist social analysis mistakes ongoing praxis for fixed synchronic being. — Fredric Jameson, Marxism and Form, 531; Positivist sociology borrows natural-science criteria and lacks the dialectical principle — Antonio Gramsci, Selections from the Prison Notebooks, 1524; Separating philosophy from history and politics reduces it to metaphysics — Antonio Gramsci, Selections from the Prison Notebooks, 1551