Finally, strategic persistence is not stubbornness. Sun Tzu cautions, “He will win who knows when to fight and when not to fight.” The discipline is to adapt relentlessly while predefining exit criteria—time, capital, or evidence thresholds—to avoid sunk-cost traps. In practice, teams set hypotheses, run small experiments, and let resistance guide iteration; if signals stay negative against clear benchmarks, they exit with learning, not regret. [...]