I've been interested in this opposite/shadow type thing. SO I was thinking that if you by cognitive functioning, the exact opposite of a type would be determined by switching the middle two letters. For example, an ISTJ conventionally has these functions:
So the exact opposite type by functions would be determined by switching the middle two letters (S and T), and thus get INFJ:
So the exact opposite type of ISTJ is INFJ, and for every type would be switching the middle two letters. Thoughts?