What is necessary for a reliable nuclear weapons system according to the provided information?

A reliable nuclear weapons system necessitates a rigorous testing and inspection regimen. This is crucial because consistent testing and thorough inspections ensure that all components and systems function correctly and meet safety standards. Rigorous testing evaluates the reliability and effectiveness of nuclear weapons, confirming that they perform as designed under various conditions. Inspections help identify any potential issues or wear that could compromise the system's integrity over time.

While other options may contribute to the overall reliability and safety of a nuclear weapons system—such as education, safety procedures, and maintenance schedules—none are as foundational as a rigorous testing and inspection process. This thorough approach identifies potential failures before they lead to significant issues, making it the cornerstone of maintaining a trustworthy and effective nuclear arsenal.