CONCEPT
Phenomenal Consciousness
The felt quality of experience—the redness of red, the specific ache of pain, the sheer there-ness of a moment—distinguished by Ned Block from functional access to information, and the aspect of mind most at stake in asking whether an AI system is truly conscious rather than merely intelligent.
Phenomenal consciousness is what
Ned Block named, in his landmark 1995 paper, the half of mind that resists functional explanation. It is experience itself—not the ability to process information, not the availability of a mental state for reasoning and report, but the raw qualitative feel that makes seeing blue different from not seeing it, that makes pain something suffered rather than merely registered. Thomas Nagel, writing two decades earlier, had asked what it is like to be a bat; Block's contribution was to show that this “what it is like” is a technically distinct phenomenon from the functional architecture of the mind, separable in principle from
access consciousness, and responsible for the specific difficulty of
Chalmers' hard problem. The distinction matters for artificial intelligence with a directness that is almost violent: a
large language model can produce a moving description of loneliness without any loneliness being