Suppose that every imaginative variation [I don't mean this in any technical sense] of what is physically possible is necessarily possible: because what I can imagine follows from logic alone.
already: □ (◊A → ◊A) what i think i am asking is: ◊A → □◊A and so: ◊A → □◊A → A
or have I misinterpreted that something follows from logic alone?
If not, and if you equate imaginability with metaphysical possibility, then anything about the physical world that is metaphysically possible is metaphysically actual. Which is, I confess, somewhat absurd.