Izzat asked: Based on your research, Is it possible to have 2 personality types?
Are you familiar with Dissociative Identity Disorder (DID)? How about…Multiple Personality Disorder? The answer is yes, but not under normal circumstances.
Unless you have gone through massive levels of trauma– the answer to your question is no.
Also, your inquiry does beg the question of what is meant by “2 personalities,” because under certain definitions, we could include shadow functions as a second personality if you’re unhealthy enough.
Take Doctor House for instance. He’s an INTJ, but he’s so mentally unstable that he spends enough time in the hold of his shadow functions (ENTP) that he might as well have 2 personalities. This is the main reason that people mistype House.
Read this post if you haven’t yet.