  For Heidegger, then, we start not with the present-at-hand, moving to the ready-to-hand by adding value-predicates, but with the ready-to-hand, moving to the present-at-hand by stripping away the holistic networks of everyday equipmental meaning. It seems clear, then, that our two positions are diametrically opposed to each other, but why should we favour Heidegger's framework over Descartes'? Heidegger's flagship argument here is that the systematic addition of value-predicates to present-at-hand primitives cannot transform our encounters with those objects into encounters with equipment. It comes in the following brief but dense passage: “Adding on value-predicates cannot tell us anything at all new about the Being of goods, but would merely presuppose again that goods have pure presence-at-hand as their kind of Being. Values would then be determinate characteristics which a thing possesses, and they would be present-at-hand”(Being and Time 21: 132). In other words, once we have assumed that we begin with the present-at-hand, values must take the form of determinate features of objects, and therefore constitute nothing but more present-at-hand structures. And if you add more present-at-hand structures to some existing present-at-hand structures, what you end up with is not equipmental meaning (totalities of involvements) but merely a larger number of present-at-hand structures.