[PeterisP]

But organic brains aren't some magic unknowable mush, we know how they work on a low level, we can trace how visual processing is done, etc, etc. As far as we see, the raw computing capabilities of biological neurons that we understand are sufficient to explain the behavior of animals, and as far as we see, biological brains don't do anything that can't be replicated with sufficiently powerful digital computers. So while it's technically possible that consciousness is a specific property of organic brains, we have no evidence at all that it would be the case and some (although not conclusive) evidence that there's nothing special, so unless we identify some difference, those hypotheses are not comparable and we should assume that according to our best current knowledge there aren't any specific properties of organic brains.