Let me tell you something strange: We don’t know how to build the Space Shuttle anymore. NASA had the plans. The blueprints. The specs.What they didn’t have was the team —the network of minds, habits, and shared mental models that made it all work. That knowledge didn’t live in one document. It lived in hallway conversations. In hand gestures. In intuition built through repetition and failure. When those engineers retired or moved on, the Shuttle didn’t just become obsolete.