Programmers are mostly translating business rules to the very formal process execution of the computer world. And you need to both knows what the rules means and how the computer works (or at least how the abstracted version you’re working with works). The translation is messy at first, which is why you need to revise it again and again. Especially when later rules comes challenging all the assumptions you’ve made or even contradicting themselves.
Even translations between human languages (which allows for ambiguity) can be messy. Imagine if the target language is for a system that will exactly do as told unless someone has qualified those actions as bad.
Even translations between human languages (which allows for ambiguity) can be messy. Imagine if the target language is for a system that will exactly do as told unless someone has qualified those actions as bad.