The Physics of Extended Simples
Braddon-Mitchell (David) & Miller (Kristie)
Source: Analysis, Vol. 66, No. 3 (Jul., 2006), pp. 222-226
Paper - Abstract

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Authors’ Introduction

  1. The idea that there could be spatially extended mereological simples has recently been defended by a number of metaphysicians (Markosian 1998, 2004; Simons 2004; Parsons (2000) also takes the idea seriously). Peter Simons (2004) goes further, arguing not only that spatially extended mereological simples (henceforth just extended simples) are possible, but that it is more plausible that our world is composed of such simples, than that it is composed of either point-sized simples, or of atomless gunk.
  2. The difficulty for these views lies in explaining why it is that the various sub volumes of space occupied by such simples, are not occupied by proper parts of those simples. Intuitively at least, many of us find compelling the idea that spatially extended objects have proper parts at every sub-volume of the region they occupy. It seems that the defender of extended simples must reject a seemingly plausible claim, what Simons calls the geometric correspondence principle (GCP): that any (spatially) extended object has parts that correspond to the parts of the region that it occupies (Simons 2004: 371).
  3. We disagree. We think that GCP is a plausible principle. We also think it is plausible that our world is composed of extended simples. We reconcile these two notions by two means.
    1. On the one hand we pay closer attention to the physics of our world.
    2. On the other hand, we consider what happens when our concept of something - in this case space - contains elements not all of which are realized in anything, but instead key components are realized in different features of the world.

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