Before revision: 97–122 Denton saw the evolution of consciousness as a gradual, continuous process, beginning in the brain's most primitive regions with non-reflective consciousness of instincts, followed by the emergence of reflective consciousness of the sensations and impulses that comprise these instincts, then reflective consciousness of surroundings evolves, followed by the emergence of reflective consciousness of memories and behavioural options.
After revision: 97–122 Denton saw the evolution of consciousness as a gradual, continuous process, beginning in the brain's most primitive regions with non-reflective consciousness of instincts, followed by the emergence of reflective consciousness of these instincts, then reflective consciousness of surroundings evolves, followed by the emergence of reflective consciousness of memories and behavioural options.