Conspansive duality is one of several duality principles in the CTMU. On the surface, conspansive duality says that there is no difference between the expansion of the universe with respect to its contents, and the contraction of its contents with respect to it. This follows from the self-containment of reality. If there were an external scale by which to measure reality, the external scale would itself be real and therefore internal to reality (a contradiction). Hence the real universe has no external size; it can only be measured internally, by the size ratio of the system to its contents. Since the ratio is all that matters, expansion of the universe is equivalent to a contraction of its contents. At a deeper level, conspansive duality relates two complementary views of the universe, the conventional geometric model and a dual generative model, by conjoining the "ectomorphism" of the former with the endomorphism of the latter. Cosmic expansion and ordinary physical motion have something in common: they are both what might be called ectomorphisms. In an ectomorphism, something is mapped to, generated or replicated in something external to it. However, the Reality Principle asserts that the universe is analytically self-contained, and ectomorphism is inconsistent with self-containment. Through the principle of conspansive duality, ectomorphism is conjoined with endomorphism, whereby things are mapped, generated or replicated within themselves. http://ctmucommunity.org/wiki/Conspansive_duality This is absolutely correct. Reality is internal.