"While proficiency may not be a central goal, competence always is. The difference here may be subtle, but it is important. If an INTP decides to learn a skill, then it is very important for him that he reaches a sufficient level so that basic errors can be avoided. Errors made by others are to be expected and can be criticised. But errors made by oneself attack the very root of the person, which is ultimately about rationality, logic and truth. INTPs hate to think of themselves being in any way inadequate, at least in areas that are important to them. So, as soon as he puts himself behind some task, then he must achieve competency. But that is as far as it goes. Refined competency requires too much effort and has little attraction. It would require practice and that usually bores an INTP. Hence, it is common to see INTPs dabbling at many things, achieving competency, just enough to prove to themselves that they could become more proficient if they wished, but rarely actually bothering to refine their skills further. This is a point at which we begin to get a feel for the workings of iNtuition backing up Thinking. The INTP has a whole set of skills which he knows that he would be proficient at, yet other people may know little of this. He is satisfied with the knowledge that he has these skills but often sees no requirement to demonstrate this to others, an indication of the strong Ti nature."