Status: OUT
Some structural mechanisms serve both correctness and efficiency rather than addressing them as separate concerns: sentinel initialization can prevent boundary bugs while also eliminating first-iteration branching, and exact arithmetic can prevent precision errors while also avoiding float conversion overhead. However, the antecedents identify these as construction techniques for correctness and work-elimination strategies for efficiency respectively — the dual-purpose nature is an observed overlap rather than a demonstrated unifying principle, and the greedy-algorithm claim (simultaneous optimality guarantee and early exit) is not supported by either antecedent.
Construction techniques serve dual purposes — each eliminates a correctness failure mode and a performance failure mode simultaneously, so the repo pays once for both
Depends on (SL): correctness-by-construction-not-validation, work-elimination-at-two-abstraction-levels