Certainly-- that was somewhat sloppy of me. In my defense, however, a priori and conceivability/imaginability are pretty inextricably tied. Additionally, you yourself used the word "envision." [...] It would perhaps be helpful if you could clarify what you meant when you said: [...] Your usage doesn't seem to fit into the Kantian sense of the term-- the unity of my experience of the world is not conditioned by everything being reducible. What do you mean when you say irreducibility is a priori logically incoherent?