No failures, no progress.

A British engineer, named Pugsley, said in 1966 that “a profession that does not make mistakes is a profession that does not progress” (Pugsley A.G. 1966, The Safety of Structures, Edward Arnold Publishing ltd, London). In his pioneering book on the safety of structures, Pugsley related that fighter pilots in WWII went up against the enemy even when there was a high chance of being shot down. However, the same pilots demanded design changes if the structural failure rate of…

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