A cautious optimism pervaded the gubernatorial debate hall at the Richard Nixon Library Wednesday night. One boy is Assemblyman Kevin Kiley, 36, who was just nakedly the brightest candidate on the stage Wednesday night. The only thing that kept him from running away with at least the debate trophy is that the man with solutions to the state with problems enunciates his ideas at an AK-47 clip, making anyone watching distracted by trying to guess whether it was Harvard or Yale Law School where the aspirant governor might have picked up a prolific cocaine habit.