An essay by this thinker uses the example of a silversmith creating a sacrificial vessel to argue that Aristotle’s four causes don’t account for how the silversmith is engaged in a poesis. This thinker’s quote “the nothing itself nothings” is often criticized as an example of nonsense in a lecture by him that claims the fundamental question of one discipline is “why is there anything at all?”. This thinker, who analyzed the (*) Gestell of technological objects, used the example of reaching for a (10[1])hammer to delineate the difference between objects that are “present-at-hand” and “ready-to-hand”. This author of “What is Metaphysics?” proposed that every human has a “being-in-the-world” as an essential part of their Dasein. For 10 points, name this thinker who wrote Being and Time. ■END■