[spectrrr]

destruction of the brain seems to be the common lore for killing them. Even though they don't really have higher brain functions, SOMETHING has to process visual and auditory cortex input and issue commands to walk, bite, devour, etc.

I think the EXCEPTION to that rule could be if the zombies were created with really advanced nanobots. Then the nano bots could be programed to function as a primitive AI mesh network, which would mean you really couldn't kill the things unless they were burned up with fire. Even knocking off the head would still leave a deaf and blind body trying to do -something-. In other words, we would be totally and unequivocally FUKED!