Want knowledge and to be competent, to achieve mastery. Seek expertise to understand how the world and things in it work. Are theory oriented. See everything as conditional and relative. Are oriented to the infinite. Trust logic and reason. Want to have a rationale for everything. Are skeptical. Think in terms of differences, delineating categories, definitions, structures, and functions. Hunger for precision, especially in thought and language. Usually are skilled at long-range planning, inventing, designing, and defining. Generally are calm. Foster individualism. Frequently gravitate toward technology and the sciences. Tend to be well suited for engineering and devising strategy, whether in the social sciences or physical sciences.
The core needs are for mastery of concepts, knowledge, and competence. People of this temperament want to understand the operating principles of the universe and to learn or even develop theories for everything. They value expertise, logical consistency, concepts, and ideas and seek progress. They tend toward pragmatic, utilitarian actions with a technology focus. They trust logic above all else. They tend to be skeptical and highly value precision in language. Their learning style is conceptual, and they want to know the underlying principles that generate the details and facts rather than the details alone.
They prefer using their gifts of strategic analysis to approach all situations. They constantly examine the relationship of the means to the overall vision and goal. No strangers to complexity, theories, and models, they like to think of all possible contingencies and develop multiple plans for handling them. They abstractly analyze a situation and consider previously unthought-of possibilities. Researching, analying, searching for patterns, and developing hypotheses are quite likely to be their natural modus operandi.