The contemporative has both coordinative and subordinative functions depending on context. Complex major sentences can either be coordinative or subordinative. After this setting of coordinative definition, however, the geometry of spacetime is set. Such a circle can be broken by way of coordinative definition.(Norton 1992). The problem is that coordinative definitions seem to beg the question. Reichenbach's conventionalism, applying to space and time, focuses around the idea of coordinative definition. Steric factors therefore dominate, with coordinative saturation of the metal being balanced against inter-ligand repulsion.