Which of the following is NOT considered a tenet of airpower?

The correct answer identifies "Surprise" as not considered a tenet of airpower in the context provided. Airpower tenets are foundational principles that guide the effective use of air power in military operations. Key tenets include mission command, which emphasizes decentralized execution and initiative, flexibility and versatility, demonstrating the ability to adapt to changing circumstances and missions, and persistence, indicating the sustained engagement capability to achieve objectives over time.

While surprise is indeed a critical concept in military strategy overall, it is not typically classified as a primary tenet of airpower specifically. Instead, surprise may play a significant role in operational success and decision-making but does not encapsulate the core principles that define the effective application of airpower. Thus, identifying "Surprise" as not a tenet aligns with the specific characteristics deemed essential for the operation of air forces.