Of course Jung gave the means the dichotomize the types into J/P, but he did not describe exactly what kind of type would result from splitting types by I/E S/N T/F Rational/Irrational. Myers went ahead and dichotomized the types in terms of J/P by the secondary function that Jung mentioned. This was a roundabout way that complicated things as we see them now.
(i)NTFS
An ILI at rest tends to remain at rest
and an ILI in motion is probably not an ILI
♫ 31.9FM KICE Radio ♫ *56K Warning*
My work on Inert/Contact subtypes
Socionics Visual Identification(V.I.) Database
Socionics Tests Database
Comprehensive List of Socionics Sites
Fidei Defensor