Answer: The quick explanation is that he needs facts to satisfy his preference for Introverted Sensing (Si). He also has an Extraverted Thinking (Te) logical approach so you may get an argument because he doesn’t think about human behavior as much as you do and can present a “devil’s advocate” approach.
My suggestion is that you back up your Extraverted iNtuition (Ne) point of view with concrete examples and facts if possible if you want his agreement.