The light bulb is definitely a less-than-apt metaphor. I think the crux of what he's asking about is the line between a system's production of subjectivity and

The light bulb is definitely a less-than-apt metaphor. I think the crux of what he's asking about is the line between a system's production of subjectivity and a subject's experience of it (which constitutes the subject as such). The separation between the two seems to be absolute, i.e. if "brains cause minds," as Searle puts it, no amount of introspection on the part of the mind allows it access to the brain. Consciousness is a one-way trip. How to distinguish between the two might be an interesting question from, say, a Chinese Room[1] or p-zombie[2] standpoint, which might have some philosophical bearing on AI. But that's about all I can think of off the top of my head. 1. http://en.wikipedia.org/wiki/Chinese_room http://en.wikipedia.org/wiki/Chinese_room 2. http://www.skepdic.com/zombies.html http://www.skepdic.com/zombies.html