It is something that I tought about last day. I mean ISTPs are Ti dom, and that make them share some commons issues with NTs. At the same time, ENTx and INTJs are considered as more pragmatic and action oriented, and, especially for xNTJs, more practical. We share also the chart-the-course interaction style with INTJs and and Se and Ni with xNTJs, plus the Te process and the Ti-Se process have a lot in common. On other side, INTP are considered as the most oriented toward pure knowledge and lack of action of all type, wich is not really an ISTP issue. What do you think about?