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JanetK comments on Open Thread: May 2010, Part 2 - Less Wrong
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I believe there is scientific agreement that the memory of an event in episodic memory only can be done it the event is consciously experienced. No conscious experience = no episodic memory
A certain type of learning depends on episodic memory and so conscious experience.
The fine control of movement depends on the comparison between expectation and result, ie error signals. As it appears to be consciousness that gives access across the brain to a near future prediction, it is needed for fine control. Prediction is only valuable in it is accessible.
I am not saying that memory, learning or fine motor control is 'done' in consciousness (or even that in other systems, such as robots, there would not be other ways to do these things.) I am only saying that the science implies that in the human brain we need to have conscious experience in order for these processes to work properly.
Yes, consciousness is certainly involved in the way we do some of those things, but I don't see that as evidence that that is why we have consciousness. Consciousness is involved in many things: modelling other people, solving problems, imagining anticipated situations, and so on. But how did it come about and why?
FWIW, I don't think anyone has come close to explaining consciousness yet. Every attempt ends up pointing to some physical phenomenon, demonstrated or hypothesised, and saying "that's consciousness". But the most they explain is people's reports of being conscious, not the experience that they are reports of. I don't have an explanation for the experience either. I don't even have an idea of what an explanation would look like.
In terms of Eliezer's metaphor of the Explain/Worship/Ignore dialog box, I don't worship the ineffable mystery, nor ignore the question by declaring it solved, but I don't know how to hit the Explain button either. For the time being the dialog will just have to float there unanswered.