Gilbert, age 19, is described by his parents as a 'moody child' with an onset of odd behavior at age 14, which caused Gilbert to suffer academically and socially. Gilbert has lost the ability to complete household chores, is reluctant to leave the house, and is obsessed with the locks on the windows and doors. Due to Gilbert's early and slow onset of what is now recognized as schizophrenia, his prognosis is considered: