What Defines a Cognitive Boundary: A Minimal Dissolution Form

If a cognitive boundary can be constructed, which elements are truly essential, and which are redundant? This paper shows that the full structure of cognitive boundary can be reduced to a minimal parameter set without loss of definition. Starting from the general form: Boundary = (E, A, M, Π, Σ, K), we systematically eliminate components that do not affect the final boundary. We prove that generation (E), stability (Σ), and convergence mechanism (K) can all be removed without changing the resulting boundary. The boundary is fully determined by: accessible domain (A), mapping into structure (M), and indistinguishability relation (Π). The central result is: Cognitive boundary is completely defined by indistinguishability over structured input. Thus, all other components act only as construction processes, not defining conditions. A change in boundary occurs if and only if the indistinguishability relation changes. This establishes the minimal structural core of cognitive boundary and clarifies which elements are fundamental versus derived.