A Consciousness Conscious Only of Itself
The notion of a consciousness conscious only of itself is a common form of the fallacy of the primacy of consciousness. It can be easily attacked on those grounds but simply more straight-forwardly it is a contradiction in terms:
If nothing exists, there can be no consciousness: a consciousness with nothing to be conscious of is a contradiction in terms. A consciousness conscious of nothing but itself is a contradiction in terms: before it could identify itself as consciousness, it had to be conscious of something. If that which you claim to perceive does not exist, what you possess is not consciousness.1
This specific form of the primacy of consciousness is seen in Aristotle’s unmoved mover.