Principle 1: All individual human beings differ with their own personal
identity and individuality formed by their own unique genetic, ontogenetic,
epigenetic, and experiential background.
yes. what does this have to do with anything?
Principle 2: The individual MBTI preferences are the fundamental unit
of analysis for type theory.
no. extraversion/introversion of functions and function positions are the fundamental unit of analysis in type overall. when it comes to individual level, you need to take differentiation of functions into account also.
Principle 3: The individual preferences are arranged as sets of
kinda. ISTJ and ENFP has the same functions, but in different order. for ISTJ Ne and Fi are the complementary opposites for Si and Te, for ENFP this is the opposite.
Principle 4: The individual preferences are free to combine with each other and in any order.
yes if you look at E-I, S-N etc dichotomies, but when it comes to functions this sort of approach doesent work, thus this is irrelevant to anything than newbies trying to figure out their possible type.
Principle 5: The combination of individual preferences is additive
rather than interactive.
not true for the most parts, but kinda true in some aspects(but not how he meant it). if we take Si and Ne as an example, Ne being perception via unconscious; something is perceived in external world(consciously or unconsciously) and the perception triggers process of unconscious comparison between the external perception and what already has been stored in brains, to cause what dario nardi called trans-contextual thinking. Si on the other hand is subjective perception, perceiving according to what already has been stored in the brains. it is pretty clear that there is an interaction between these two functions, but if it were this simple and there only being one comparison, it couldnt be called interactive, but additive. however when there is neural activity in your brains(like this NeSi thing), brains are constantly being modified, Ne modifies Si and Si modifies Ne, therefore it is flawed to call this additive. not to mention that this seemingly random activity of Ne is using other brain areas, but doing so unconsciously, so its interacting with other functions than just Si(personally i think nardis view on Si is bit flawed, but thats not all that relevant).
now this isnt the only reason why that statement is flawed, there is another major thing that people often dismiss or dont understand about typology(havent seen this talked on MBTI at all), it is true that we all possess the brain regions which are involved with both orientations of all functions, however this isnt the definition of using that function. whether you use Ti or Te is about whether that brain area is developed(differentiated) enough to be consciously directed(this is why jung said that undeveloped functions are neither extraverted or introverted, since they are neither directed by the subjective or objective factor, they are there just to interact automatically with other contents of your psyche). now we need to go look at this thing that consciously directs those brain areas(or combination of areas) which we call functions. this naturally is the ego and is located in deeper parts of the brains. in order for action potential(energy that is either carried further in brains or suppressed by neurons) to get to these deeper parts of the brains and not just modify neural connections locally(and depriving the information that has been processed from coming to consciousness), you either need strong impulse(continuous stream of action potentials, neurons have thresholds which store action potentials for a short periods of time) or very well developed neural connections in that part of the brain(this is what jung called differentiation), which physically is less neurons trying to stop the impulse, since this sort of stimuli has happened multiple times, which has caused the neural connections to specialize for this sort of info. and now to the point . these mid brain structures that create consciousness and work as the ego try to eliminate unnecessary information from overloading consciousness, combining relevant aspects from all impulses that are compatible with each others, this way they are additive, but its also interactive, because there is interaction between some brain areas before they are added together(or suppressed) by ego. for example with INTP and getting embarrassed, this embarrassment comes from same region as where Fe is, but with undifferentiated Fe, this information doesent go directly to consciousness, but leaks on the neighboring areas, having an interaction with Si and the product of this interaction goes to deeper parts of the brains without suppression(if you consciously do get embarrassed) and might interact by suppressing thinking for example, due to the strong impulse coming from FeSi embarrassment combo.
Principle 6: The expression of psychological type is fundamentally
contextual and situational.
true, but INTPs psyche expresses(reacts with) thinking more often than ESFJ for example. so while it is situational, there are still preferences.
Principle 7: MBTI preference scores matter and indicate strength of
MBTI scores indicate clarity of preference(due to the structure of the assessment), its not a score of strength or amount of preference. hello MBTI 101!
Principle 8: Type dominance is a function of strength of preference and the dominant preference is simply the independently high-value preference.
stupid mistake in thinking due to not understanding the fundamentals of the test or theory behind it.