Here's how this thread has gone so far:
1. You posted your findings
2. People presented evidence contrary to your findings, sparking what could be a productive thread
3. You disregarded the legitimacy of this evidence, became defensive, and began using arguments such as "Well, uh, TIME TRAVEL! DUN DUN DUN!" and "Says who?"
I will concede that the zombies in COD don't technically need a brain all the time, because those couple seconds they continue to move (before inevitably dying) totally count. However, it's pretty common knowledge that, aside from COD, zombies can't function without a brain, but that's beside the point.
Now, will you please address the obvious timeline and appearance issues that naturally arose when you decided to present your findings to an internet message board? Will you please use logical arguments backed up by evidence? If not, please stop claiming this as the absolute and final truth. Please understand that this is what this forum is for--putting our heads together to productively figure out this game, not butting heads until everyone agrees with what we (you) say.