can peple with degree in psychology predict any thing about another person?
Not really, people with degrees in Psychology usually become Shrinks or some type of Psychologist. Although, Criminal Investigators can do something to that effect, predicting motives, frame of mind, even a criminals future ambitious attempts at crime.
It is not fact that the people who have degree in psychology can predict anything about other person they can only predict some things because they get training to understand human behavior they can only predict any thing in the way person behave and tell about his past.
if the person with degree in psychology has good training then he can interpret the actual cause and reason of the particular problem or personality trait. Because he is to get professional training to understand human behavior.