Unverified50% confidenceFactExact time

统计学家亚伯拉罕·瓦尔德在二战时期指出，军方只能检查安全返航飞机上的弹孔分布，而被击落的飞机无法被观察到

1

Sources

50%

Confidence

Long-term

Relevance

8/28/2026

First Seen

Sources

How to Prepare for Technical Interviews: Practical Strategies for Tackling Open-Ended System Design Questions

Related Entities

Abraham Waldperson

Related Claims

UnverifiedCivil aviation authorities in various countries have not yet established a clear approval framework for close-following devices regarding urban low-altitude flight, safe distances between drones and crowds, and aircraft certification.53% similar

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