But in all seriousness, I feel that the main purpose of this duality is for ESI to act as a buffer for LIE’s plans (i.e. LIE talks about a plan and if ESI feels -emphasis on the word feel cuz Fi- it’s “No.”) along with their emotional retardation. EIE-LSI works as LSI being a buffer to their strong emotions and weak logic, which also comprises their own plans in bad ways.