Been reading a bunch of Wittgenstein, whom I've become semi-famous for dissing. Going to admit: Philosophical Investigations invents several fundamental ideas. I might find the writing kind of irritating: I see why people love it too though; it's really rich and exploratory.
Maybe it’s conventional, but the river bed is one of the best epistemological metaphors I’ve come across and likely relates very closely to the actual physical functioning of cognition Also, language games is a pretty good model for understanding our present moment