Hi Tom, I feel uneasy about your "operational principle of correspondence" , your "What is real corresponds to what is possible in a reciprocal manner." For something to be real it has to have been, and be possible but possibility does not require the reality of the possible. To illustrate, here are two different scenarios
1. there are 6 playing cards, one is selected. The un-selected, which were also possible choices are counterfactual. Equally real but not the selected result. 2. There is a vat holding six cups worth of water, as a single body of liquid. A cup of water is taken from the vat.There are not 5 more individual cups of water that are the counterfactual not drawn water, although there was the possibility of taking six cups worth out of the vat. The cup of water selected has only come into being at the act of taking the water. Which for this scenario makes real and possible very different from scenario 1.
You write "we are forced to admit the possible is equal to the inevitable" At the time the result is obtained the possible has been reduced to the inevitable outcome but prior to that reduction in possible outcomes, (through decision of what states will be considered , the viewpoint, the apparatus and/or method applied), the possible exceeds the singular result. And as in the water scenario the possibilities need not be real, isolated results, awaiting selection. (An argument against local realism and counterfactual definiteness.)
With respect, Georgina