Comment Re:What we don't know... (Score 1) 564
I think your mistake lies in the word "initial". If I am correct, consciousness is a recursive process, and a break anywhere along the essential path keeps it from occuring. They've found one place where a break will keep it from occuring. I expect there are others. But you don't get consciousness until ALL the pieces are present, because consciousness requires recursion. So there isn't any "initial" piece. You can start at any of several different places, and if all the pieces are there, you get consciousness.
Please note that there are lots of pieces that aren't a part of the essential path. Late Alzheimers are conscious, even though they are separated from their memory. So is an infant. And it's separated also from intelligence. And from most sensory perception. (It's hard to be sure that consciousness doesn't require SOME sensory perception, but there's no evidence that it does. Helen Keller shows that certainly only minimal sensory perception is required.) Some trance states seem to show that it can be suppressed by certain paterns of thought...though I'm not sure, as it could be that they just reduce the level of memory formation until you can't remember being conscious. Are sleep walkers conscious? They don't remember what they were doing when they awaken, but this isn't really proof. Perhaps they are non-verbally conscious, and so the memories formed aren't indexed with verbal tags, but at the time they MAY have been conscious.
So it's quite difficult to determine from commonly available data what parts of the mind are necessary for the presence of consciousness. Even the definition is a bit fuzzy. If you don't remember being conscious, does this mean that you weren't? I don't think so, but many common uses of the term seem to imply this. E.g., the common proof of unconsciousness under general anesthesia is that you don't remember being conscious. But anesthesia commonly interferes with memory formation even while you are recovering from it to the point of asking questions. And I think that if you are asking "How did the operation go?", then you need to be counted as conscious, even if you can't remember either asking the question or what the answer was.