Evaluatory and situational
Evaluatory functions are the strongest (1 and 8) and weakest (4 and 5) functions of a person's psyche; strong judgments about areas that involve these functions are made.
Accepting-evaluatory functions, specifically the base and suggestive, are valued by the individual. Evaluations made here are taken seriously, as they compose the center of one's personality. In the leading function lies the core of their evaluations and decisions and so remains firmly inert; information accepted in the complementary suggestive function is also evaluated by an individual, but being weak and still yet valued, it strives to make contact with the environment to develop.
Producing-evaluatory functions are subdued by the individual; evaluations are produced here only when information cannot be processed by valued accepting functions and are instead processed by our subdued accepting functions. Since the information produced in these areas are subdued, evaluations are generally negative but nonetheless firm. This is especially true of the vulnerable function. As for the demonstrative function, evaluations are produced in favor of one's creative function, so it is taken less seriously even though an individual is quite sophisticated in that area.
Situational functions are accessed on a case-by-case basis, so decisions and judgments made in these areas are more or less inclined to remain constant.
Accepting-situational functions (3 and 7) are subdued and only accept information in cases where the data accepted cannot be confidently evaluated by one's valued accepting functions. In the role function, information is accepted consciously but is subdued as it opposes the base function. It's also a contact function, which is why it is seen as somewhat of an importance to an individual, but definitely not emphasized. In the ignoring function, information is accepted even moreso on a situational basis because a person is strong in this area but neglects it over their preferred strength in the base function. Information is mostly ignored here and instead accepted by one's suggestive function.
Producing-situational functions (2 and 6) are situational since they only produce information that has been accepted by our valued-evaluatory functions. One's creative function produces strong and valued information that must make contact with the environment for their ego to be heard. However, new information is only produced in situations the base function can accept information. One's mobilizing function is inert, weak and valued, so information produced here isn't quite understood consciously but still acts as a driver for the creative function.
Understanding this function dichotomy is integral in fully realizing how types metabolize information as it forms the "information pathway" that connects our Model A together.