I wonder why you don't automatically think of an Architect when thinking of a Rational?
Mostly because of Hubris.
There is a certain amount of arrogance regarding having a "gut" reaction to those of the same type as one's self. I have a highly selective gut feeling for my fellow Architects, if I don't have a strong feeling, they aren't Architects
. In the beginning of my "typing" career, which started informally, I essentially was very narrow in my assessments "who could be a Rational", unconsciously figuring only "scientists" could be Rationals. For a long time, my "Architect" obsession with science and ideas colored my perception. I started reading biographies of scientists and mathematicians very early, only branching out later seeking diverse Temperaments. To be a famous
scientist, often you had to be more of a bastard, like Issac Newton (a Mastermind). The Architect Rationals are mostly "quiet," such as guys like Paul Dirac
(an Architect)for except of his absolute brilliant mind, wouldn't become famous. Non-science Rationals I am rather hard in including as Rationals, and Fieldmarshal and Inventors more often are successful in outside science than us Architects.