The I Inside by Alan Dean Foster

For over 100 years, the machine called Colligatarch had ruled the Earth. Its predictions of the future have proved so accurate that humans accepted its recommendations as the best course of action–until a young engineer in Phoenix begins to travel without authorization, enter secret places, assume aliases, and display super-human feats of strength. Is it because he has fallen in love? Or has he instead fallen into an interplanetary plot?