I from as far as I review my writing on PROMPTS  in particular.  Put 76 % of my full answer in the title.    A  sign of brain cells in a whacked out state.   Or  …… better .    Duhhh  it is  a combo(  probably ) .   Hey if I only knew where went that old World   T I m e     ,    document with some  specific stating of written words.  So my answer is that we ,,,,any four or so of us on average is unique as the word unique.  Grouped as this singular whole the Human  Race has extra terrific differences.   THIS PRODUCES THE GRANDNESS OF US ALL .