Extreme realism (Lewis), and abstract realism, about worlds. Introducing an approach to subjunctive conditionals through possible worlds; use of this to explain the failure of transitivity and antecedent strengthening. The notion of variably strict conditionals is explained, and the logical likeness of subjunctives to indicatives is explained. Discussion of subjunctive with disjunctive antecedents.
Keywords: conditionals, disjunctive antecedents, indicative conditionals, possible worlds, realism, subjunctive conditionals