What the heck is CHIM? And the Zero-Sum? Also, can a mortal become a god? Cuz i think i've read somewhere that any spirit can become a divine being just by having a cult, i mean ppl, believing that the spirit is indeed divine (or something like that lol). And what is a god anyway?
OK, there are people on these forums who know this a lot better than I do, but I'll give it a shot. CHIM and zero-sum are very inter-related. Zero-sum is learning everything in the world, and realise your place and disappear. CHIM is almost the same thing, but instead of disappearing, you change the universe so you are the most important thing, kind of. Vehk is the only confirmed case of someone achieve CHIM.
Mortals can become gods, but usually, after they became gods, they were never mortals. Not by having a cult though. It takes quite a bit more. Most the time breaking the Dragon (or linear time) is involved. Examples of mortals-become-gods are Vivec, Almalexia, Sotha Sil, Mannimarco, Talos and possibly the Divines (Aedra). Mortals usually become by mantling or apotheosis. The Dragon is always broke when a new God is formed.
What is a god? That is a tough question. Is a Daedra a god? Are the Aedra truely gods? What about the man-became-gods? It depends on the definition. Many people don't consider the Tribunal gods. Some don't consider the Daedra as gods.