Unless something to the contrary is explicitly said in a given subjunctive conditional, the closest antecedent worlds are ones that are exactly like the actual world until shortly before the time of the antecedent and then fork away from such likeness in some inconspicuous manner. The alternatives are: the closest world is unlike the actual world through all pre‐antecedent time; at the closest world, the antecedent comes to be true with a ‘bump’. This chapter discusses what goes on at a fork and the temporal locations of forks.
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