Someone tell me if this is correct...
Types are either Static or Dynamic.
Statics think of objects/systems as occupying certain states(EP), the interactions of which are determined by particular rules(IJ).
Statics either focus on the current state and intention of objects/systems (Se), or the states into which those objects/systems may possibly mutate in accordance with the aforementioned rules (Ne).
The rules are either designed for consistency, so that rules applied in one instance also apply in others (Ti), or for moral/gut appeal, so that no individually objectionable cases may be deduced via application of said rules (Fi).
(My understanding of Fi might need some work.)
Dynamics focus on their own current state (IP) and the actions they are performing (EJ).
Dynamics either pay more attention to their own conscious state (Si), or their own unconscious sate (Ni).
(This might warrant explanation. I am unsatisfied with "Ni=mental Si-physical" because Ni POLR does not seem to cause a lack of awareness of mental state. Rather, Si types seem to watch how they feel, mentally and physically, while Ni-egos look more than any type at thoughts floating up from the subconscious, as well as granting more significance than other types to semi-conscious associations of unclear or nonverbal origin.)
The actions performed can be split into goal-based (Te) and role-based (Fe).
(I say this because Te types seem to act based on the perceived objective necessity of whatever actions, whereas Fe types seem to act out characters with which they try to function in a consistent manner. Of course, the specific roles being played can change frequently.)