I paraphrase: "Thinkers debate truth; Feelers arrive at truth." .
CC did make a statement as follows, Thinkers dispute truth and Feelers understand/sense/see the truth. It is unclear from this statement whether she meant that Feelers have conclusively attained an objective understanding of the truth, or merely attempt to do so.
For instance, when somebody is telling me a complicated story and I am just beginning to listen, I could say I see, or I understand, meaning I am paying attention and trying to know what is going on.
I know you wouldn't make a statement like this if you realized it was conjecture, but it is. This isn't fact, and there's no evidence whatsoever to support it, only the theory of function order, which is also conjecture.
It could hypothetically be true, and it could hypothetically be false, so I choose not to rely on it. It's just as likely that it actually is Fi, and just as likely it's something we don't understand.
It is not conjecture.
Consider the following.
Axiom: Thinking, Feeling, Intuition, Sensation outline the basic tendencies of the human mind. These faculties we call the functions because they perform operations of thought. Extroversion, Introversion, Judgment and perception are attitudes as they merely describe how we perform such operations of thought.
For example, Extroversion and Introversion directs what our cognitive processes focuses on, the inner world or the outer. Judgment and perception specify what cognitive activity we are engaging in, merely perceiving or moving towards a decision.
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Axiom 2: Cognitive faculties of Thinking, Feeling, Intuition and Sensation are antithetical to each other.
Proposition : We have earlier established that Introversion and Extroversion specify the direction of the cognitive process. Therefore because we know that an Introverted function and an Extroverted function advance in different directions they do not contrapose each other.
Thus, for the INTP, Introverted Thinking is the dominant function. The most opposed function is Introverted Feeling because it is the Feeling faculty in the Introverted realm. Extroverted Feeling is not opposed by Introverted Thinking because it is in a different typological zone.