Judgement day would have to be inevitable whichever way you look at it, or you end up with another paradox. No Judgement day - No John Connor. Remember he has to send his own father back in time in order to conceive him. - Weird or what!! -. So if they do avert it, connor would surely fizzle out of existence. At least one bit of truth came out of t3 when arnie said that judgement day had been postponed and not avoided. Good film, but poor sequel, too many flaws with the time line, I dont think mostow did his homework and watched t2 enough, and John connor........ what a wimp he is in this film - leader of the resistance????? He doesn't look as if he could arrange a piss up in a brewery..... nah in my opinion t4 is a must and all mistakes must be rectified, with ole jimmy cameron behind the wheel again.