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

Flaw with your logic - the history being different means, at minimum, the historical record changes. From there, it springboards into people studying different things, logic being different, etc.

While it might be possible to get something close to the same present, managing that outright is impossible.

It's an intriguing theory, but not possible.