  In light of the historical nature of philosophy, Yorck draws two decisive methodological inferences. First, he rejects as too rigid and untenable the opposition between theoretical or systematic philosophy and the history of ideas (CR, p. 251), because, as an ongoing historical development, philosophy always requires both a genetic and historical clarification, as well as a systematic and theoretical account. Instead of a mutually exclusive relation, Yorck sees a mutually productive combination. Second, because Yorck always includes the present situation within the domain of history, he calls for a “critical,” and not “antiquarian,” or quietistic mode of philosophizing (CR, p. 19). Speaking for Dilthey and himself, Yorck argues that this critical work of philosophy lays the groundwork for the practical intent or the historical vocation of philosophy: 