What is the paradox of no causality in time travel?
if time travel was possible, then the the time line would follow a rule of one line back but infinite lines forward. because you could go back along your time line, but once you have entered the past you have already altered your future and you could never get back to were you came from it may look the same but some event no matter how big or small has been changed. so killing yourself as a baby will kill yourself in that time line but not the one you are in. of course by going back in time you have created matter or at least made the matter in yourself twice in one dimes ion and absent in another, so both of them and the dimes ion between them and around them would be destroyed.
