Carl Jung
Carl Gustav Jung was a Swiss psychiatrist, psychotherapist, psychologist and pioneering evolutionary theorist who founded the school of analytical psychology.
Jung wrote Psychological Types, a foundational work behind Thomson's Personality Type: An Owner's Manual. One could argue he's the granddaddy of these systems (Thomson's, MBTI, Socionics, etc.).
Jung's Type
Hypothesis: ISTJ
As evidenced in the way he built his type system (within the confines of the book Psychological Types):
Psychological Types, Ch. 11, Definitions:
It may perhaps seem superfluous that I should add to my text a chapter dealing solely with definitions. But ample evidence has taught me that, in psychological works particularly, one cannot proceed to cautiously in regard to the concepts and terms one uses: for nowhere do such wide divergences of meaning occur as in the domain of psychology, creating only too frequently the most obstinate misunderstandings.
Lenore, p. 188:
They are masters of gradual, almost imperceptible modification. They tinker here, shore up there, solve problems and rectify ambiguities, all the while preserving the best of what exists, scarcely recognizing that in the process, they've adapted form quite brilliantly to function.
Such types can find it difficult to limit and organize the data of their mental world without an external reference point to guide them.
Introverted sensation motivates ISTJs to acquire facts and to retain them (memory), but it offers no way to discriminate among them rationally (see prior sentence).
they can strike others as overly cautious and unyielding workaholics.
If he isn't an ISTJ, he's most likely an INTJ.
See also: http://urticator.net, ISTJs, introverted sensation
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