Not to mention, as we usually don't here, that the subconscious and the collective unconscious must be recognized to impinge upon and influence that which we consciously feel and therefore think.Having said that, I still believe however that whatever sets consciousness neural processes apart from non-conscious neural processes won’t be observable/measurable.
So two observably/measurably identical (this includes identical situations - i.e. where they are located and how they are connected to the rest of the network) "neural processes" could exist and one would be conscious and the other not ... determined strictly by subjective requirements (which are determined by what?)
It will be something subjective; internal to the system. It will have something to do with the role that particular neural process plays in implementing the organisms world model.
So what subjectively determines the role that a particular neural process plays in implementing the organism's world model? and how does this interact with the physical aspects of the process... i.e. what is the mechanism of causality here?