1. On prediction: If you had a maximally detailed model of someone's worldview, you would be able to predict their views accurately at a given time. I'm sympathetic to this in principle, because people are often very predictable and stick within their rubric. I would add, though, that worldviews change and evolve in weird ways, and sometimes people also have views that ... don't seem entirely predetermined by their worldviews or their own history? I think there can be something situational and emergent about our views, and this isn't completely predetermined by a worldview. (Let's leave aside that we don't have enough data to accurately construct the originally suggested model — we aren't omniscient, but I for one am OK with that.)
2. On hidden premises: Sometimes you try to have a conversation with someone and find out that they have some basic differences in their theory of knowledge such that you can't get through to them at all. Like "No matter what you say is true, I will hypothesize that evil hidden forces are misleading us." (It's kind of the postmodern version of Descartes' evil demon hypothesis, if you like.) I don't find this claim too surprising in the general case, but I do think, in the specific political context of the USA at the moment, it's worth remembering that it is a nation divided not only by political but also by epistemological differences.
It's a long post but these were the parts I found the most interesting.