E or I doesn't mean social or reserved, E means Te, Fe, Se, Ne, I means Ti, Fi, Si, Ni, Te, Fe, Se, Ne serve as the root of socializing, no matter being INTP or ESFP. So forth: INTP Ti, Ne, Si, Fe Social Facade: Ne It second and so the INTP is interest less to socializing, more in dominant Ti that be introspection. You real fool to oppine Ne, Te, Se, Ne translate to equal social role most vivid in INTJ vs INTP. INTJ - supremely serious and disassociated- Te social function. INTP - Whimsical and playful- Ne social function. On some time, Ne of person be poor and they use logic of Ti that be said in Ne, like normal in dominant to auxilery.