“…characterised by the supremacy of the reasoning and judging functions.”
but is yet
“…influenced in almost equal degree by unconscious irrationality.”Error:  shortcode requires URL to be set
From the outside, with no consideration of “unconscious manifestations” this type may in fact appear more irrational than most.
“…the case with the psychologies of both Freud and Adler. The individual is completely at the mercy of the judging observer, which can never be the case when the conscious psychology of the observed is accepted as a basis. He afterall is the only competent judge, since he alone knows his conscious motives.”
Here Jung lays down the reason (or one of them) for this split with Freud, the split itself seemingly focussed around Jung’s insistance upon the importance of individual subjectivity and Freud declaring that such a perspective was not valid, was meaningless as it belonged to the realm of the sub-conscious (Jung uses the term unconscious to highlight its importance, that it wasn’t merely a sub-set of consciousness as Freud declared).
Of course Freud would say that. Dude wanted to kill his father and sleep with his mother and he found the idea abhorrent. It was only by projecting this desire onto everybody else (the Oedipus complex) that Freud was able to deal with it.
“…life in both these types [reasoning/judging] involves a deliberate exclusion of everything irrational and accidental… a force that coerces the untidiness and fortuitousness of life into a definite pattern, or at least tries to do so… restriction of sensations and intuitions is not absolute… but their products are subject to the voice made my rational judgement.”
“For them nothing is rational save what is generally considered as such. Reason, however, is in large part subjective and individual. In our types this part is repressed… Both the subject and his subjective reason, therefore, are in constant danger of repression…” at the whims of ‘objectivity’ and the object “…and when they succumb to it they fall under the tyranny of the unconscious, which in this case possesses very unpleasant qualities… primitive sensations that express themselves compulsively, for instance in the form of compulsive pleasure-seeking in every conceivable form; there are also primitive intuitions… everything sniffed out and suspected, in most cases it is a half truth calculated to provoke misunderstandings of the most poisonous kind… the individual becomes the victim of chance happenings, which exercise a compulsive influence over him either because they pander to his sensations or because he intuits their unconscious significance.”
Rationality then is handed down via consensus; What has been called Consensus Reality. What the majority agree, either consciously or unconsciously, to be reality. This world view, however, does not take into account either subjectivity or the unconscious. What i think Jung is saying here is that when you ignore subjectivity and and unconscious you can become enslaved by them. This enslavement takes place through the lens of ‘rationality’. When you ignore sensations and intuition then intuition and sensation present themselves to the conscious mind as in fact being rational thoughts. This is of course posited on the fact that the mind in question is lacking equilibrium. When everything is running smoothly everything is cool.
This type brings to mind the ‘character’ of the paranoid conspiracy nut – everything he does and thinks/feels he considers in the upmost as Rational. He checks constantly to see if anyone is following him because it is reasonable for him to assume somebody is because of what he knows or at least thinks he knows. You could have a lot of fun with this type in a narrative watching their sense of reason and logic eeat them alive. In fact I would argue that many a screenplay/novel turns on this idea of a protagonist’s rational world view being turned on its head. The idea of this reversal is a strong impetus for the dramatic.