Consciousness is proposed as a graded physical property, measurable on one continuous scale using the same substrate methodology as the rest of the programme. Not a binary a system either has or lacks.
A physically grounded, quantitative measure of degree of consciousness, the Consciousness Index, applied across 100 species. Consciousness as a graded property of organised physical structure, extending the same substrate framework used throughout the physics programme. An evolutionary account of consciousness as a directional process, not an undirected one shaped only by selection pressure.