[feanaro]

I see this kind of debate between people often. I think the crucial point is the "feeling" that is the subjective experience.

Some people feel there is no way for such a "feeling" to form spontaneously out of the cold, dead matter. Since some matter doesn't experience this feeling, how does it spontaneously form, out of no-feeling, at some threshold configuration? What is this threshold exactly? These people think it must special, since we can imagine (in principle) a clump of matter interacting physically in time to simulate the external appearance of a human mind, yet remain no-feeling on the inside.

Other people don't seem to grasp what the problem the first people are posing might possibly be. The "feeling" is simply a property of the universe which arises in some physical configurations. Computers can have subjective experience and even today's computers might have it in some form. There is no discrete, magical step required.

I find myself continually switching teams on this matter. The second position might be more believable after we find some laws governing the relationship between physical configurations and the nature of the resulting experience. But since subjective experience is necessarily... subjective, it seems very hard (impossible?) to test.