> This largely has to do with 'unknown unknowns' What has been much, much more worrisome in my practice, is ‘unknown knowns’ which is something developers shou

> This largely has to do with 'unknown unknowns' What has been much, much more worrisome in my practice, is ‘unknown knowns’ which is something developers should know but do not. Poor design and engineering skills, low level of professionalism is what keeps plaguing software industry. (Remarkably, most other industries, those that have to deal with material things, do not suffer from this - not on this scale anyway.)