Here I was thinking that there are twelve distinct personality types! Then along came the sixteen Meyers-Briggs Personality Types.... And I was all like "whaa..." And now this... I thought there'd be more, not less!
Twelve was wrong. Sixteen was wrong...
But hang on a sec... What do Twelve and Sixteen have in common?
THE FACTOR FOUR!!! Yes!!! It all makes sense now! Yes!!! I've been so blind all my life!
And looking around, thinking about my family, friends, colleagues, relatives... Indeed, they are essentially four personalities. Yup, this explains EVERYTHING!