D2 What Makes a Question Illicit

This paper establishes a boundary criterion for question admissibility within a closed epistemic framework. It proves that a question is illicit not by virtue of difficulty, undecidability, or lack of information, but because its formulation violates admissibility by presupposing forbidden scope transport, external authority, or non-conserved standing. Illicit questions are shown to induce collapse independently of any proposed answer. The analysis is strictly eliminative and non-constructive: it introduces no new primitives, specifies no procedures, and provides no methodological guidance. The result functions as a boundary theorem, fixing the conditions under which inquiry itself becomes inadmissible in closed systems.