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Description of Ti from "Dual Nature of Man" by A. Augusta
White (introverted) logic Ti
We call 'logical' those feelings that arise from the process of comparing one object to another on the basis of some objective criteria — for example, a sense of distance, weight, volume, worth, strength, quality, etc. These are feelings of objective evaluation, which in certain situations help to activate or passivate the person who experiences them. Incoming information is recognized by such an individual as a sense of objects' proper or improper correlation and proportion, a sense of balance or imbalance between the objects, or a sense of understanding or lack of understanding of the advantages of one object over another. This also includes all feelings that result from knowing or not knowing objects and phenomena — curiosity, respect, fear, and a sense of the logicalness or illogicalness of things, as well as a sense of one's own power or powerlessness before different objects.
All these feelings we shall call logical. Their sum is a person's sense of logic, which is developed to different extents in different people. We might say that logical feelings convey information about presence or lack of knowledge, comparability and incomparability, and the presence or lack of balance between them, as well as about the space and location of object within it. These feelings are called objective because they do not take into consideration the interests and needs of the person him/herself, but only such correlations of objective qualities. This perceptual element determines a person's ability or inability to see the objective, logical relations between objects or their components.
When this element is in the leading position, the individual is distinguished by his or her ability to logically evaluate relations of the objective static reality, or the world of objects. He also has the ability to change the interrelations between properties of different objects according to his wishes, and through this influence objects themselves as carriers of these properties. Correct evaluation of one's relations with other objects helps the individual know which objects should be avoided, and which can be "hunted." Such an individual is able to set his logic — or his knowledge of objectifiable reality, patterns, laws, and correlations of the objective world — in opposition to knowledge of others. He has the ability to mold and perfect not only his own knowledge of objectifiable reality, but also that of other people. This creates a feeling of power when clashing with other people's logic or lack thereof.