Perhaps what I am going to write has been discussed before. I dunno
I know very little about ants, but I think that there are basically three types of ants: Queen, Warrior and Worker. They have different sizes, mentalities, bodies, traits, etc
At the same time, I believe that sensors have stronger, more muscular bodies whereas intuitors have quicker brains, able to handle abstract data, etc, etc
Perhaps some kind of specialization exists in the human species, as it exists within the Ants. Do you agree?
So, provided that this specialization is real. Do you think our ancestors (homo erectus and such) could be classified into 16 types? There was lots of types but only 16 have survived to evolution? --> If some type becomes useless, will it become extint? On the contrary, has the 16 types system been there, unchanged, since the birth of our species?
As necessity arises, can we expect the "birth" of new types?
Does nature promote the birth of certain types (SLE?) in extreme environments whereas it allows lots of N types to thrive in mild environments?
Will Batman escape?