Keelefilosoofia raamat
a couple of hired killers.
Thus there are a number of ways the world might have been. To put it
slightly more fancifully, there are alternative worlds. Different worlds, worlds
that could have been ours, but that are only possible and not actual. Think
of an array of possible universes, corresponding to the infinitely many ways
in which things, very broadly speaking, might have gone. All these possible
worlds represent nonactual global possibilities.
Now (obviously) a sentence's truth--even when we hold the sentence's
meaning fixed--depends on which world we are considering. "Brown is
Prime Minister" is true in the actual world but, since Brown need not have
been Prime Minister, there are countless worlds in which "Brown is Prime
Minister" is false: in those worlds, Brown did not succeed Tony Blair, or never
went into politics, or never even existed. And in some other worlds, someone