Status: OUT
The codebase's deterministic test infrastructure validates structural correctness properties (immutability, synchronized structures, state ratchets) that are already guaranteed by construction, while the compounding safety-correctness gaps at temporal boundaries — where actual production risks concentrate — fall outside the deterministic testing regime, creating an inverse relationship between test coverage confidence and residual risk.
The d4 testability node shows what IS tested (structural properties); the d4 gap-compounding node shows what ISN'T (temporal boundaries) — the emergent insight is that testing covers the safe half and misses the risky half
Depends on (SL): structural-correctness-and-testability-are-co-designed, safety-and-correctness-gaps-compound