Status: OUT
OO design's dual invariance — scale-invariant via SOLID's self-grounding, classification-invariant via the variation taxonomy's transcendence of catalog boundaries — is complemented by double grounding: spatiotemporal infrastructure provides concrete lifecycle backing while LSP's type governance supports formal correctness across the object lifecycle. Together these form a basis for design capability that operates across scales and categories.
Depth-10 — connecting abstract invariance properties (depth-9) to concrete grounding mechanisms (depth-9) establishes that the dual invariance is not merely structural but materially supported
Depends on (SL): design-invariant-across-scale-and-classification, full-scale-design-doubly-grounded