Radiation

It has been previously argued here that Circularity is conceivable in independence from Geometric notions, such as Center and Radius. That contention is reinforced by the converse considerations not only that those latter two are conceivable in independence from Circularity, but, also, that they, too, are not exclusively Geometric. For, they are both plainly derivable from the familiar natural phenomenon Radiation, which is, of course, observable on a daily basis. Radiation is a projecting-outwards, which can be analyzed as consisting of a source and rays, a further refinement of which yields the concepts Center and Radius, without implication of the concept of Circularity. Salient in the phenomenon is its ordering, i. e. even insofar as Radiation is conceived as a unitary continuous phenomenon, the region of its source has a privileged status in comparison with its outer reaches, e. g. the sun in comparison with its illuminating rays. Also, even if Radius is thereby distinguished from Center for analytical purposes, it remains an indefinite aspect of the phenomenon, i. e. it does not possess, as the Geometric version of the concept does, length.