User blog comment:VonGlusenburg/Alternate universes, probability and alternative outcomes/@comment-1777104-20120816175000/@comment-3967693-20120817004508

While our ASB page claims that ASB simply means its aliens/other supernatural incidents that make PODs possible, the Wikipedia definition states that it's a "plot device used in alternate history to create a point of divergence that would otherwise be implausible." So, ASB can't be limited to supernatural or otherwise universally inconstant incidents.

And to the "anything is possible" that people are mentioning, let me put it to you this way: I suppose a timeline where Malta conquers the whole continent of Africa is thus possible, or Luxembourg having the largest navy in the world, or Napoleon conquers North America using his army, or an apartment building empire claims half the Earth. No. Not everything can be possible. Human nature plays a part in the universe, but we do have limits.