These can be put into a hierarchy from lower to high degree of processing and resulting abstractions:
Sentience is simple hard-wired behavioral responses to pleasure or pain stimuli and physiological measures.
Wakefulness involves more complex processing such that diurnal or sleep/wake patterns are possible (requires at least two levels).
Intentionality means systematic pursuing of desires. That requires yet another level of processing: Different patterns of behaviors for different desires at different times and their optimization.
Phenomenal Consciousness is then the representation of the desire in a linguistic or otherwise communicable form, which is again one level higher.
Self-Consciousness includes the awareness of this process going on.
Meta-Consciousness is then the analysis of this whole stack.
These can be put into a hierarchy from lower to high degree of processing and resulting abstractions:
Sentience is simple hard-wired behavioral responses to pleasure or pain stimuli and physiological measures.
Wakefulness involves more complex processing such that diurnal or sleep/wake patterns are possible (requires at least two levels).
Intentionality means systematic pursuing of desires. That requires yet another level of processing: Different patterns of behaviors for different desires at different times and their optimization.
Phenomenal Consciousness is then the representation of the desire in a linguistic or otherwise communicable form, which is again one level higher.
Self-Consciousness includes the awareness of this process going on.
Meta-Consciousness is then the analysis of this whole stack.