- Some might argue that an infinite regress passes as a causal explanation of nature. But it doesn't, because an infinite regress never reaches the causal origin or "first cause" of nature, which is also the causal identity of nature. In contrast, the CTMU identifies nature as its own causal identity, recognizing it as its own cause, effect and causal agency. That's called "closure", and without it, one doesn't have a causal explanation (since a causal explanation is really what is being "enclosed" by the identity). This is deduced rather than "predicted".