User blog comment:VonGlusenburg/Alternate universes, probability and alternative outcomes/@comment-1777104-20120816175000/@comment-1295538-20120817010733

Of course everything is possible, but like Lurk says we have to draw the line somewhere, be it the laws of physics or likely outcomes from events. We should be sensible with our changes and try to remain probable but a lot of stuff is only possible thanks to hindsight. For example if you were an alternate historian living in ancient rome, and you publish a timeline following the course of our actual history, I could see many of your fellow ancient roman alt. historians dismissing it and saying that the British will one day go on to have the world's strongest navy and take over India is impossible. NVM that a country from an unknown continent will go on to put a man on the moon and wipe out an entire city with a single explosion/nucear bomb.