Look at it like this...Ne and Ni were added to the rest to give people more choices. Most agree even 16 aren't enough. What will be added next? Have some common sense here people. There really are only 12 types in reality. Haven't we all read descriptions of Ne and Ni? All they really are are extentions to Se and Si. Senses exist. Feelings exist. Thinking exists. Intuition? Seems a bit like a novelty or something.