I was thining about this the other day and to me I will stick with the literal definition of Si as internal sensation vs Fi as internal feeling. These would actually be very hard in a romantic sense to distinguish. Because internal sensations can be confused with good feelings.
I was curious about how ISTJ in particular felt because of there tertiary Fi. Does this make sense in that sometimes feelings get confused with the sensations that cause them? Like hurt and sadness or something that is pleasurable and happy or something like that?
I get lost between Ti and tertiary Ni and the line between when validated logic starts to cross into abstract theory.
How do others feel about there confusion between your dominant and tertiary functions?