Ok, so one thing i like about socionics is you have the 16 types, 4 quadras, 4 personalities per quadra. Each one has their dual etc. The idea of this makes me feel warm and fuzzy inside. But life to me is not normally like this. What would the evolutionary basis be for this seemingly even system? It just seems to me it would be more likely that some types would have no duals and others might have a number of "duals".