I'm still confused about the part where Elizabeth pull Booker to the future, showed him what she became and gave young Liz advice on how not to become her. From my understanding, the story of Bioshock Infinite has been in a time loop for a very long time. Each time there are factors that always remain constant, e.g., the flipping of the coin. And there are variables with all those player choice and other one off things.
My question, Is old Liz giving advice to young Liz a constant or a variable within the loop? Without her advice, Booker and Liz wouldn't be able to destroy Cyphen(sp) and the SongBird would have stopped them from accomplishing their goal.
Another confusion, Comstock knew Booker will kill him and deliberately pissed him to off to make sure it happens. What does that accomplish? From the little research I did, it seem to be a common factor that everyone agrees on. Booker killing Comstock is leading him to become Comstock. But the ending of the game specifically mentions that Booker becomes Comstock when he accepted his baptism to erase his sin from the indian/chinese wars.
Edit: one more question. What is suppose to happen if everything went according to Comstock plan after he's dead?
Sorry for the bad writing, English is not my 1st language and all these dimension tearing is making me fussy.