..."symmetry"? Is there something I am not getting here? >_>
Does it matter?
Superficial and cosmetic ordering is different from the actual dispositions caused by psychological orientation. I can't tell if you're referring to the former, latter or both.
(i)NTFS
An ILI at rest tends to remain at rest
and an ILI in motion is probably not an ILI
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My work on Inert/Contact subtypes
Socionics Visual Identification(V.I.) Database
Socionics Tests Database
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Fidei Defensor
it's a simple and straightforward empirical fact that the function we currently know as the 4th is the vulnerable one, whereas the 3rd is not.