  Each of these aspects of Heidegger's framework in Being and Time emerges out of his radical rethinking of Aristotle, a rethinking that finds its fullest and most explicit expression in a 1925–6 lecture course entitled Logik (later renamed Logik (Aristoteles) by Heidegger's student Helene Weiß, in order to distinguish this lecture course from a later one he gave also entitled Logik; see Kisiel 1993, 559, note 23). On Heidegger's interpretation (see Sheehan 1975), Aristotle holds that since every meaningful appearance of beings involves an event in which a human being takes a being as—as, say, a ship in which one can sail or as a god that one should respect—what unites all the different modes of Being is that they realize some form of presence (present-ness) to human beings. This presence-to is expressed in the ‘as’ of ‘taking-as’. Thus the unity of the different modes of Being is grounded in a capacity for taking-as (making-present-to) that Aristotle argues is the essence of human existence. Heidegger's response, in effect, is to suggest that although Aristotle is on the right track, he has misconceived the deep structure of taking-as. For Heidegger, taking-as is grounded not in multiple modes of presence, but rather in a more fundamental temporal unity (remember, it's Being and time, more on this later) that characterizes Being-in-the-world (care). This engagement with Aristotle—the Aristotle, that is, that Heidegger unearths during his early years in Freiburg and Marburg—explains why, as Sheehan (1975, 87) puts it, “Aristotle appears directly or indirectly on virtually every page” of Being and Time. (For more on Heidegger's pre-Being-and-Time period, see e.g., Kisiel 1993, Kisiel and van Buren 1994, and Heidegger's early occasional writings as reproduced in the collection Becoming Heidegger. For more on the philosophical relationship between Husserl and Heidegger, see e.g., Crowell 2001 and the review of Crowell's book by Carman 2002; Dahlstrom 1994; Dostal 1993; Overgaard 2003.)