Introverted Logic (Ti)
Introverted logic is an introverted, rational, and static information element. It is also called Ti, L, structural logic, or white logic.
Ti is generally associated with the ability to recognize logical consistency and correctness, generate and apply classifications and systems, organize systematic and conceptual understanding, see logical connections between things (including logical similarities, differences, and correlations) by means of instinctive feelings of validity, symmetry, and even beauty. It is like common sense, in that it builds on one's expectations of reality, through a somewhat personal, though explicable, understanding of general truths and how they are manifested.
Types that value Ti naturally question the consistency of beliefs that are taken for granted in everyday life. They strongly prefer to make decisions based on their own experience and judgement, as opposed to relying on external authorities for knowledge, which they use only as a last resort. They also have respect for people with clearly defined and internally consistent opinions, believing that a sense of internal certainty is necessary for orienting oneself in life. To these types, one's personal standards of truth are more reliable than public consensus.
They see overly pragmatic views as shallow, and try to limit public discussion of mundane practical matters. They are especially sensitive to redundant information.
Ti as Leading Function
The individual views reality through the lens of logic, immediately recognizing the correctness and appropriateness of things and their proper place in reality and in his system of views and behavior. He freely makes logical assertions, often exaggerated, about new information and experience. He holds highest those rules to which exceptions do not exist, and is a habitual critic of people or things that don't follow a set of rules, whether they are those accepted by the community, or his own, or even the other person's. Although he is able to adopt others' rules, his own are always the last word, and these are subject to continual refinement. Often seen as "demanding", due to high standards.
Ti as Creative Function
The individual easily generates logical systems and formulations to explain a set of phenomena that he has experienced or studied. However, these logical systems or explanations are not viewed as permanent or all-encompassing, but can be improved upon or even discarded as new experience and information is added.
Ti as Role Function
The individual is able to talk about things from a dispassionate academic or theoretical point of view for brief periods of time, but seems overly bookish when doing so and tends to grows tense. When feeling obliged to justify logically a personal decision taken for reasons determined by , the individual attempts to do so but grows quickly annoyed especially if the inconsistency in the logical argument is pointed out. He then either explains the ethical motivation or avoids the issue altogether.
Ti as Vulnerable Function
The individual has a tendency to either completely reject or completely embrace a source of theoretical knowledge, but does not like to reveal the source or his adherence to it. He prefers to limit the number of theoretical categories he works with and tends to see new terminology, systems, and rules as being arbitrary and unnecessary until he at last discovers their necessity for himself through extensive personal experience. He may be able to express his views clearly when given the time, but he is not prepared to deal with people who challenge his views and draw him into logical arguments and disputes. For this reason, he is reluctant to publicize new determinations and opinions until he is absolutely sure that they are right and that he can support them thoroughly to anyone who challenges them.
Ti as Suggestive Function
The individual has great admiration for people with well-developed systems of views. He especially likes clear and concise explanations of concepts, rather than a lot of background information about them that is not directly pertinent. He wants his actions to make sense, and thus needs external assurance that the conceptual understanding behind them is correct. If he cannot find a source of certainty, he may become flustered and unable to act rationally at all.
Ti as Mobilizing Function
The individual seeks clarity in his system of beliefs and understanding and enjoys entertaining new concepts and being included in philosophical discussions where new concepts and systems of thought are introduced. He is uncertain of the logical clarity backing his actions, and thus seeks external assistance in attaining a degree of reasonable competence in this realm. Structure is sought as more of a means to an end, a background guide to facilitate the growth of the individual's main goal.
Ti as Ignoring Function
The individual understands easily, but is largely indifferent to, discussions that focus on the internal logic of ideas and systems. The individual perceives such logical systems as largely worthless to his goals and finds them completely uninteresting and unproductive.
Ti as Demonstrative Function
The individual often criticizes others' views from a logical standpoint, picking apart statements and postulates and showing that they are logically flawed. However, he does not choose to do this excessively and does not expect that reality can be accurately expressed in a neat logical systematic anyway.