[quote=@whizzball1]
<Snipped quote by Webmaster>

But that's causality at its strictest. Stuff doesn't change. All things come together so that everything stays the same. Did you go back to kill your grandfather? Oops, you were accidentally already born. Or, that was a look-a-like. Or everyone thought he was dead.
[/quote]

That requires an authority figure to manipulate there timeline. You know, the job of Time Line.