User blog comment:VonGlusenburg/Alternate universes, probability and alternative outcomes/@comment-4727448-20120814225011

Nothing is ASB. Because those ASB things are unknown to us, we call them impossible. However, in an alternate universe, it could be fully possible.

And let's Napoleon conquered Europe. If someone wrote a TL about Napoleon losing, it would be ASB, yet it that is what happened. See?

So thus, nothing is ASB.