Is it at all related to interest in strange codes and systems, conspiracy theories, secret societies and the like.
I'm thinking the fascination with Ti in Ti-HA produces the sense in these types that life has an underlying code or system to it, this produces a fascination with secrete societies, conspiracy theories, and secret codes, alchemy, and bible codes.
Usually Ti-ego type, while they have looked into these things, usually base their conclusions off of some measure of logical facts and inquiry. Trying to synthesize their ideas with logical to lend some credibility to their suggestions.
However in Ti-HA types, Te would be the PoLR and therefore, there fascination would not be bounded by the need to have actual facts to back up their ideas.
Finally Ti-HA types are feeling perceiving types, so likely they would base their ideas about conspiracies and secrete societies and symbols off of their feelings of things rather than off of factual information proving the existence of these secret societies. Their existence is merely "felt".
Ex) People are well connected in power, therefore there must be some secret society they are a part of, I've heard of people in power being part of organizations such as skull and bones, therefore there is a secretive power structure hidden form people. I don't need to factual prove its existence, I'm solely convinced off of my feelings on the matter that those in power are part of a secret society plotting to take over the world. ETC ETC ETC