Psychology is empirical. Psychology evolves in a sociohistorical context. Behavior is determined by multiple causes. Our experience of the world is highly subjective. Most daydreams are wish-fulfilling.
Daydreams serve a number of useful functions.
All are accurate. Jerome got out of bed and began doing calisthenics during REM sleep, probably because he was dreaming about boot camp. Research shows that we are virtually paralyzed in REM sleep. Because of his work load and his studies, Gene finds that he can allow himself only 3 hours of sleep per night this quarter. He will eventually become physically run-down and ill.