The fact that you said it would take a long series of posts to explain your idea threw me off, and I was kind of surprised when you said congratulations

"Decide as though your decision is about the output of a Platonic computation" is the key insight that started me off - not the only idea - and considering how long philosophers have wrangled this, there's the whole edifice of justification that would be needed for a serious exposition. Maybe come Aug 26th or thereabouts I'll post a very quick summary of e.g. integration with Pearl's causality.