 atomism: ancient |  categories |  cosmological argument |  dependence, ontological |  grounding, metaphysical |  infinite regress arguments |  laws of nature |  Lewis, David: metaphysics |  mereology |  monism |  multiple realizability |  nominalism: in metaphysics |  physics: holism and nonseparability |  principle of sufficient reason |  structural realism |  substance |  supervenience |  truthmakers 