This chapter proposes that bisociation, the Koestler theory of the creativity of the "Aha!" Moment, is the Ockham Razor for creativity research in mathematics education. It shows the power of bisociation in simplifying unnecessary components and in the synthesis of the fragmented ones. The discussion leads through the relationship of bisociation with Piaget"s reflective abstraction, proposes cognitive/affective duality of the "Aha!" Moment and enriches Mason"s theory of attention by the new structure of simultaneous attention necessary for the Eureka experience.