Status: OUT
The GoF's OO design achieves total design coverage — the complete design framework (composition paradigm + SOLID grounding + expert judgment) combined with comprehensive variation coverage (standard composition + principled OCP escape via Visitor) — but this coverage is bounded by the theoretical limit that behavioral subtyping at its foundation is undecidable in general, meaning complete mechanical verification of design correctness remains permanently beyond reach.
Total design coverage combines the complete framework with comprehensive variation, but LSP undecidability means the foundation cannot be fully verified
Depends on (SL): complete-oo-design-framework, variation-comprehensive-with-axis-escape