What does it mean, exactly, for a given system to be a "neural correlate of consciousness"?

I think the existence of zombies would contradict certain laws of nature in our world. It seems to be a law of nature, in our world, that when you get a brain of a certain character you get consciousness going along with it.

People have managed to avert their eyes and hope for the best.

My interests started about in science and in mathematics, I always thought I was going to be a mathematician.

How does the water of the brain turn into the wine of consciousness?

Sense data are much more controversial than qualia, because they are associated with a controversial theory of perception - that one perceives the world by perceiving one's sense-data, or something like that.

Within psychology and neuroscience, some new and rigorous experimental paradigms for studying consciousness have helped it begin to overcome the stigma that has been attached to the topic for most of this century.