User blog comment:Ralok/Alternate Pasts/@comment-32656-20120510075345/@comment-160529-20120519162818

The idea is that different conditions can lead to the historical record being identical to how it is today!

As well our historical records are not 100% accurate

We record that "someone tripped"

our present says so, but we can have arrived at the present if someone either tripped on a rock or a turtle.

What the person tripped on is not recorded, and thus we could have arrived at the conclusion of the present from multiple possibilities