Thanks for these videos!! I've been trying to learn from them The bit about a constant (0:50) had me trying to think through daily life containers where the contents don't change, and I was thinking like a can of food from the store or a box of cereal or spaghetti, where that's just what's in them My only thing I could come up with for case sensitive at 3:00 is like Bible text where some versions they delineate between "he" as a generic pronoun for any guy, versus "He" for referring to their gods Or I guess any company maybe, like how "chase" is just a verb but Chase is a specific banking company