So based on everything that I know in Socionics, there are specifically two functions that lag behind for us in terms of our proficiency:
1) The inferior and 2) The PoLR.
The main difference between the two is that in 1), we value it, and because of this (mainly our difficulty in applying this function), we would preferably seek out some complementary partner to perform it.
Contrastingly, in 2) we simply don’t see much value in performing it and so our difficulty here really stands out, likely even more so than in 1).
Based on this, I would almost say that both functions serve as quasi-PoLRs, even though one stands out more predominantly than the other.
Basically, I (as an INFJ) share with INFPs that dual pronged difficulty with both Te and Se, and both of these two functions in both types can be a decent struggle for both INF types to execute.
I would imagine that this can be generalized to all other types (where the first three letters are the same).
