I'm trying to figure out what metric could establish dichotomies in socionics. I think you would need 6 absolute scales: 2 for information, 2 for metabolism and 2 for type.
The reason for 2 scales is to make sure the opposing categories are actually linked. What if someone is neither bold nor cautious in the domain of fields? In that case, not being bold with fields does not imply cautiousness and extraversion per se.
Also, there might be different kinds of dichotomies. It makes sense to define information categories based on dominant aspects of types. The contrast between logics and ethics is most obvious between logical and ethical leading types. But would a dichotomy trained to identify the leading function for rational types also work to identify the creative function of irrational types? If not, even if the extravert / introvert dichotomy is jointly exhaustive, maybe the practical application of the logical verses ethical dichotomy is not, and should be expanded to be the tetrachotomy of leading strengths or the tetrachotomy of ego rationality.
This possibility of neither scale applying is labeled "Yin" in the table.
The yellow "Type" category would be static traits that apply generally to a person's character, contrasted to people of the opposite type. The problem with this is the type is often defined by stereotyping the type as only its dominant aspect, even if both types do both things.
To make a better description, you can define the dominant aspect of each type in terms of information, and then watch how both types react to expressing each kinds of information. For there to be a different type, there has to be a different reaction, such as a feeling, to acting out the information.
For introvert / extravert, maybe the metabolic feeling is confidence for bold functions and hesitation for cautious functions. Then you would track what action categories were confident and which were hesitant. If you got it these definitions good enough, you could type someone from a single situation, regardless of how they were acting, as long as you could identify how they felt.