"Things that have never happened before happen all the time."
Scott D Sagan, The Limits of Safety
"The enemy of safety is complexity."
Behind Human Error, Woods et al, Ashgate 2010 p 23
"Knowledge and error flow from the same mental sources, only success can tell one from another."
Ernst Mach, 1905
"Enhancing error tolerance, error detection, and error recovery together produce safety."
Behind Human Error, Woods et al, Ashgate 2010 p 26