> babies are already born with "the model of the world"

> but a lot of experiments on babies/young kids tell otherwise

I believe they are born with such a model? It's just that model is one where mummy still has fur for the baby to cling on to? And where aged something like 5 to 8 it's somehow useful for us to build small enclosures to hide in, leading to a display of pillow forts in the modern world?

damn I guess I had to be more specific:

"LLM-level world-detail knowledge"