i THINK i may understand why you are always saying that the grandfather paradox is not a paradox.
a moment cannot be changed. the fact that you are alive now tells you that you will be unsuccessful if you should ever travel back in time to kill your father.
if you go back in time, you will have been there the one and only time it came around. it isn't like you missed a play, so you caught the next one and kept it from proceeding as usual.
even though "now" is different to everyone, "now" cannot be changed by future events. what happened happened and what didn't happen, didn't happen. nothing will ever change that.
am i right or way off?
edit: my last post was just to bump the thread in case anyone else knew anything about the subject.