As per Blake’s article on the two forms of Ti for INFJs, Gemini Ti = impersonal objected oriented = hard sciences etc. Pure maths. Analytic philosophy. Etc. Bad for INFJs in excess cos it gets them stick in their Ni-Ti loop. Aquarian Ti = subject/people oriented = social science etc. Sociology, MBTI, etc. Healthier in general for INFJs in the long run.
So, what about Ni-Ti loops if the INFJ in question is obsessed with Aquarian Ti-type questions? I can see why INFJs can get stuck in endless philosophizing over Gemini Ti-type topics: endlessly questioning the nature of reality, and then proceeding to question the foundations of knowledge of such metaphysical knowledge (epistemology), and then questioning the mode of questioning (meta-philosophy), on and on into an endless black hole/Ni-Ti loop. But what if the tertiary Ti “obsession” is over more Aquarian subjects in general? For example “What are the essential differences between different societies?” Would that manifest in a different form of the Ni-Ti loop or avoid it altogether through involving Fe in some way? Whatddaya think?