I didn't imply otherwise. I just didn't explicitly mention global variables because that will always remain a possibility that lurks over everything. Technical

I didn't imply otherwise. I just didn't explicitly mention global variables because that will always remain a possibility that lurks over everything. Technically, we can never rule them out because it's possible that all the universe and all the events of universe were preordained by one massive global variable, without any particular rhyme or reason for rules and laws for mechanics of local behavior.