Mises stresses both the purely formal character of praxeology, and the uniqueness of man set apart from animals by goal-directed action. To the extent the former is true, however, the latter becomes less unique to man, and we may usefully interpret animal behavior this way. This suggests that the study . . .
Languages can grammaticalize a lot of different things. Japanese grammaticalizes the shape of an object with a noun suffix. Turkish grammaticalizes how certain you are of a statement with a verb suffix.
English doesn’t grammaticalize much. We just use extra adjectives and adverbs. However, I predict English will acquire a feature . . .