Full Idea
If modal Platonism was true, how could we ever know the truth of a modal proposition?
Clarification
'Modal Platonism' treats possible worlds as real
Gist of Idea
How can modal Platonists know the truth of a modal proposition?
Source
Stephen Read (Thinking About Logic [1995], Ch.2)
Book Reference
Read,Stephen: 'Thinking About Logic' [OUP 1995], p.51
A Reaction
I take this to be very important. Our knowledge of modal truths must depend on our knowledge of the actual world. The best answer seems to involve reference to the 'powers' of the actual world. A reply is in Idea 10983.
Related Idea
Idea 10983 Knowledge of possible worlds is not causal, but is an ontology entailed by semantics [Read]