two statements with truth conditions, so that reality can be either like or unlike the statement—and they are opposites, then at most one of them can be true.
Hmm, why is that? This seems incontrovertible, but I can’t think of an explanation, or even a hypothesis.
Hmm, why is that? This seems incontrovertible, but I can’t think of an explanation, or even a hypothesis.
Because they have non-overlapping truth conditions. Either reality is inside one set of possible worlds, inside the other set, or in neither set.