[bluestarultor]

Honestly, I see no reason why the entirety of time would be mapped out. History is defined in retrospect, but a look at quantum experiments shows that the presence of an observer changes the behavior of the universe, in some cases even retroactively. That indicates that time is a lot more fluid than we normally give it credit for, for one, and says outright that it can't possibly be fixed, or else there would have been no change.

You could argue, I suppose, that it was always meant to have the result an observer imposes on it, but there are other arguments to be made, which SMB is more qualified to talk about than I am.