> We have absolutely no idea what consciousness is

We do, in the sense that it is a definite feeling. What we don't have is a formal, objective, checkable definition of it. I suspect that no such definition exists: if we took the ensemble of all the intuitions and beliefs we have about what consciousness is or must entail, it may very well fail to be logically coherent. There may be no logically consistent conception of consciousness that includes the entities we strongly feel are conscious while also excluding those we strongly feel aren't. At that point we must either reconceptualize consciousness or treat it (and everything it "entails") as a brute fact, something that's true for no reason and is therefore not subject to the laws of reasoning.