Literature
Ponysalities - Twilight Sparkle - ISTJ (NOT INTP)
Being a fan of the Jungian definition of the MBTI, I'm going to take my hand at doing the most accurate typing possible of the Mane 6.
But first a brief introduction to the Jungian cognitive functions. There are 8 of them:
Ti - Introverted Thinking - This is the stereotypical form associated with thinking. It is the inward sense of pondering. It is an internally organized function. It deals with logic, theories, concepts, and other abstract ideas.
Te - Extroverted Thinking - This function is the one most associated with planning. While Ti likes to organize theories and concepts, Te likes to organize and categorize things. It is more focus