According to the interpretation below, the INTP has inferior extraverted feeling and will conform to social nicities as a means to be accepted. Conforming in such a way is not truth, it is giving in to an (dare I say?) emotion, then logically rationalizing why it is good to do so. There is a yin and yang quality of the functions, I find. One can not exist without the other. Thinkers lie to themselves (and others) just as much as feelers do. They may fool themselves into believing that they are telling an objective truth because they use logic to lie. The fallacy is in the fact that they are not being objective about their self and the way that they feel.
How do you differentiate between somebody who scores extremely high on cognitive tests in all Ti, Te, Fi and Fe??? Would it be fair to classify someone with such a score as a thinker if in the past when they were less healthy, appeared devoid of almost all emotion to others including themself?
For the full article, please check this link. http://en.wikipedia.org/wiki/Intp
Dominant: Introverted Thinking (Ti)
Ti seeks precision, such as the exact word to express an idea. It notices the minute distinctions that define the essence of things, then analyzes and classifies them. Ti examines all sides of an issue, looking to solve problems while minimizing effort and risk. It uses models to root out logical inconsistency.  Ti is calm, articulate, and aware of the forces that bind reality together. As introverted Thinkers, INTPs spend the majority of their time and energy ordering the interior, logical world of principles and generalizations in an effort to understand.
Inferior: Extraverted Feeling (Fe)
Fe seeks social connections and creates harmonious interactions through polite, considerate, and appropriate behavior. Fe responds to the explicit (and implicit) wants of others, and may even create an internal conflict between the subject’s own needs and the desire to meet the needs of others.  Fe drives the INTP to desire harmony in community. At their most relaxed, INTPs can be charming and outgoing among friends, or when they have a clearly defined role in the group. When under stress, however, INTPs can feel disconnected from the people around them, unable to use their extraverted Feeling to reach out to others. As their inferior function, Feeling can be a weak point; when threatened they will hide behind a wall of stoic logic. This can lead them to bottle up their emotions to preserve reason and harmony; but a failure to deal with these concealed emotions can lead to childish outbursts.