According to Graham Wallas _____ is the third step of the creative process which can also be called "illumination."

Graham Wallas

A social psychologist and educationalist who proposed one of the first models of the creative process in the early 20th century.

Creative Process

The series of thought patterns and mental techniques involved in producing new ideas or solving problems in innovative ways.

Illumination

Refers to the quality or state of being lit or the process of illuminating a specific area, often used metaphorically to mean clarifying or enlightening an issue or topic.