As I'm learning something, I cannkindnofnput placeholders/blackboxes in where I don't know the details, but where at this level or stage knowing the details doe

As I'm learning something, I cannkindnofnput placeholders/blackboxes in where I don't know the details, but where at this level or stage knowing the details doesn't help advance my understanding of something. We do this all the time, using simplified models, but for some reason it feels alien when the end goal is to get rid of the model and make it more detailed, like when learning a new codebase.