There is no t coordinate, and no global now sweeping across the universe. Events do not happen in the past or the present or the future, they just are. But there may be a certain… asymmetric locality of relatedness… that preserves “cause” and “effect”, and with it, “therefore”
Not to trivialize this, but Phillip Fry helps me think about it, by going back in time and being his own grandfather:
Not to trivialize this, but Phillip Fry helps me think about it, by going back in time and being his own grandfather:
http://en.wikipedia.org/wiki/Roswell_That_Ends_Well
for him, whether he was prior to his father is an unanswerable question, but the story is causally consistent.