God's Compensation/Lore/Altered Choice, 6D version

The 6D version of creating an altered time-line is a process by witch beings able to access 2 time-dimensions can take advantage of the fail-safe the universe built into itself in order to avoid temperol paradoxes that would destroy the entire universe. Simply put, it avoids the occurrance of things like the grandfather paradox.

In the grandfather paradox, one goes back in time and kills their own grandfather before your grandmother conceives your mother/father. As a result, you are never born. As a result of you never being born, you would never get the change to go back in time and kill your grandfather. Similarly, there is the Futurama version where Fri is his own grandfather. This is another kind of paradox known as a causality paradox.

If someone would trigger a paradox of this sort, it causes an alternate time-line to form. The split happens at the location in the past that was altered. However, the two separate dimensions will then re-converge. The exact point where the two re-converge is whatever time period the time-traveler originally started from.

So, for instance, if you kill your own grandfather, the alternate time-line will only come into effect when you get back to your own time period. At the same time you rejoin the time-line, your grandfather will mysteriously vanish. Everyone will remember your grandfather existed before, even after the point where you supposedly killed him. He will seem to have simply vanished at the same time you came back to existence. After that, your father will vanish, and then you will vanish. Thus, the time-line in witch your grandfather was killed takes full effect even if his death was impossible due to his murderer being you.

In the causality paradox, the moment you re-enter the time-line, you will suddenly have an aunt or uncle who is also your son/daughter. Everyone in your family will know this new person is your aunt/uncle, your parents and your other aunts and uncles will know this person is their brother or sister, however no one will have any memories of growing up with them. They will find it odd, and they will probably talk about it, but they will also feel compelled to accept it and act accordingly.

A more simple application of 6D time alteration, and the one most frequently used by 6D beings, is to get something from their house they might have left behind. Their clothing can suddenly change on the spot, or they can pull an object out of their pocket that was not there before. The only limitation to this application of 6D time alteration is that they actually have to travel back in time and get the object and have a way to carry it out on their person. As such, it is not possible to materialize objects too big to carry and you have to have at some point in your own past had reasonable access to this object. (So it is not possible to suddenly materialize the Mona Lisa unless at some point in the past you legitimately could have walked out of the museum with the Mona Lisa in hand.)