A distinction is never an isolated conceptual incision; it is the condensed outcome of earlier separations sedimented through language, institutions, spatial arrangements and habits of perception. What appears to divide inside from outside, evidence from noise or centre from margin is therefore an architecture of accumulated difference whose durability derives from convergent practices rather than logical purity. Such boundaries are politically consequential because they do not merely describe reality: they stabilise it by distributing movement, legitimacy, visibility and access. A zoning category, archival descriptor or legal threshold allocates possibilities, deciding which bodies may circulate, which claims become intelligible and which forms of knowledge remain excluded.