Objective Knowledge Isn't What I Know

At various times in the book, you sort of claim that knowledge isn't what I know or you know, it's what we know. So this brings me to a question I was kind of having throughout the book. Can you make a distinction here between like a fundamental like philosophical epistemic claim about what can be known in principle versus this more practical claim of what we have good reason to regard as publicly available knowledge? Does that question make sense? Like, is it possible for me to know something even if it's not public knowledge in your view, but rather it's just not practical?