A hypothetical British move from 13.5-inch to 14-inch guns can be traced through American reactions, later calibres, treaty limits, Nelson, King George V, and Yamato. Each navy responds to what rivals have already built, so one early calibre decision changes later definitions of an acceptable battleship. Aircraft follow the same pattern because a different type produces different operational experience. That experience then changes doctrine and the specification written for its replacement, making distant equipment lists impossible to hold constant after an early divergence.
Notable Point · 3:58:25-4:00:50
Why one design change rewrites later specifications
Changing one gun or aircraft creates a chain of responses, doctrines, and successor requirements rather than one isolated substitution.