Well then you have to do some bug hunting, but at least you'd have a fully working version of the system in miniature that you can test any hypotheses against.

Well then you have to do some bug hunting, but at least you'd have a fully working version of the system in miniature that you can test any hypotheses against. To be honest, short of issuing every developer with their own production-grade environment to debug against I am not sure what exactly would satisfy this line of questioning.