Domain category (of a hypothesis)
What it producesalso: interface integrity · information control sensing · structural topological · resource energetic · systemic environmental · candidate set selectionThe five mechanism families a set of rivals must spread across, plus a sixth reserved for identification gaps.
Interface integrity, information control and sensing, structural and topological, resource and energetic, systemic and environmental. No two hypotheses for one gap may share a category. Candidate-set selection is the sixth, used only when the gap asks which things or how much, where the rivals are competing candidate sets and the no-duplicate rule is waived. The site renders each category as words a reader can meet.