INFPs extroverted intuition supports Fi (idealized abstraction). ISFPs are a bit of a contradiction - they are sensors but aux Se supports Fi-dom. Explains why they are stereotypically artists - they feel a strong urge to manipulate physical environment to conform to an internal ideal.
Also...
My daughter is an ENTJ and my son is INFP (healing subtype). Both are adults now but they expressed different interaction styles from an early age. As a newborn, my daughter would try to mimic conversation. In fact, she would verbalize when no one else was in the room. Her brother never did...
“Any true intellectual would recognize the necessity for studying logical fallacies.”
Argumentum ad Populum - lit. argument to the people. Statement which is designed to appeal popular sentiment rather than carefully constructed reason. Materially...