A tone-deaf person would probably not be able to tell two musical notes apart unless they were very different. Hubel and Wiesel discovered cells in the cat's visual cortex that respond only to very specific stimulus characteristics. As a person walks away from you along the street, the image he casts on your retina gets smaller, yet you see him as staying the same size. Arthur has a brain tumor that is interfering with his ability to process auditory stimuli. 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.