No, MBTI Fe is a construct designed to gauge people's attitudes towards the individual and produce appropriate gestures so as to negotiate with people. MBTI Fe is like a protocol. That's why some MBTI Fi users call MBTI Fe as fake. Genuine intense emotions like enthusiasm are products of MBTI Fi as well as authentic bodily expressions of it. MBTI Fe OTOH is the filtered version of Fi and aims for appropriateness in expression of emotion felt so as to observe proper social etiquette and avoid conflict with others. MBTI Fi OTOH is concerned with raw expression of emotions felt without consideration for how others feel about that pure expression of emotion.
So, MBTI Fi = socionics Fe. Just show these descriptions to some Fi users in the forum and ask for their feedback if you doubt my judgment.
No, it is as I said above. MBTI Fe is concerned about not offending others and catering to their needs whereas MBTI Fi is more concerned about genuine self expression without concern for others' preferences except for a few intimate friends and people. Just ask xxFPs in the forum.
No, assesment of static things is MBTI Ni's job. Reducing things down to a single possible conclusion is MBTI Ni's doing. That's why INxJs appear as single minded. MBTI Ni draws out a single conclusion from an available or given set of data at any given time. Again consult with a confirmed INxJ.
Being able to guess dynamic turn of events and able to opportunize possibilities is what ENTPs and ENFPs do all the time. That's MBTI Ne's doing. Ask for feedback from ENxPs if you doubt me. That's how ENTPs get their inventor trait. That's how ENFPs seek out ways to entertain themselves.
I do it all the time. That's how I can understand things more easily. By condensing a concept into its bare essence and then overlaying it on a readily available framework thru an analogy, thereby ending up with a simpler model that is much easier to view from different angles and manipulate if need be.
Perhaps, just ask others on the forum.
Yes, we use type descriptions to type people. They serve as templates to understand how a type acts. There are good descriptions and bad descriptions. I don't write them off as incorrect completely, just as better or worse.
How can you claim that those type descriptions are wrong so easily and with so much confidence? Doesn't that undermine the credibility of the entire socionics system?
And how can you so easily write off several socionics type descriptions that doesn't fit with the j-p conversion?
I think the system is built on identifying common patterns/types in people and then building a function model to explain those patterns rather than the other way around.
Is the model configuration built on type descriptions/categories or are type descriptions built on the model configuration? Which comes first?
I think the type descriptions has to come first because without first identifying behavioural patterns in people, you cannot form a model to simulate the pattern. So the model is dependent on type descriptions, therefore you cannot write them off.
How did you decide that type descriptions are wrong?
So, identified patterns in people = Te data. Model to explain Te data = Ti data.
First off, you didn't read the entire line of expression. It is said they expressed enthusiasm physically and expressed emotions to others in an outward way. Extroverted Feeling is pouring feelings and emotions into the environment (usually aimed at achieving a goal of Pi, Si-Fe would be expressing emotions to make others comfortable and in a comfortable emotional atmosphere) while Introverted Feeling is keeping feelings and emotions in the self while exploring them and deeping them.
MBTI Fi as well as authentic bodily expressions of it.
Nope. That's Fe. Fi turns feelings toward physical expression (as in art, music, etc.) and abstract ideas (as is in the concept of love, the concept of despair, or even ideas in general, an attitude towards them). Fe is readily expressing emotions through body language and being highly open about your emotions and your realistic feeling towards stimuli. The difference is rather easy to tell, when winning a valuable award or reward, the Fe user will usually shout with joy and enthusiasm (pouring emotions outward), while the Fi user will usually feel good internally and remain pleasant and calm on the outside (except in cases where there is an Fi-Se mechanism, where perhaps physical expression will be shared, but not really with emotions, such as an angry xNTJ, who will bottle up emotions internally but end up having their internal emotions manifest into a physical compulsion to impose their will on the environment with, for example, punching something, while keeping their anger internalized*).
So, MBTI Fi = socionics Fe. Just show these descriptions to some Fi users in the forum and ask for their feedback if you doubt my judgment.
Please do. I severely doubt your judgement.
No, assesment of static things is MBTI Ni's job. Reducing things down to a single possible conclusion is MBTI Ni's doing. That's why INxJs appear as single minded. MBTI Ni draws out a single conclusion from an available or given set of data at any given time. Again consult with a confirmed INxJ.
Oh, look at that, you took the bait. Dynamic-Static isn't a quality of the Jungian Functions. You don't know what you are talking about.
Do you remember those shitty "Ah-ha" moment descriptions for Ni? Did you ever think that perhaps there was a reason behind them? It's not because they get the general idea of a concept, it is that they get the general idea of what is happening around them or what they are seeing.
In Socionics, we have Static-Dynamic to explain these things.

, is a static function, meaning that it provides the "Ah-ha" moment for static ideas. Like explaining to them how an engine works. You have to wait for it to all click as they look at it from several different angles mentally, and they just immediately understand how an engine works. They see all of the different parts of the engine in their mind, and they see how they each move to create the whole. This is a static construction. They see hypothetical properties of hypothetical things (Ne) and see how it might work in the dynamics of the environment (Si). This is Ne/Si axis

, is a dynamic function, meaning that it provides the "Ah-ha" moment for dynamic situations and ideas. They will see physical properties of things in the immediate present (Se) and interpret it in the larger scale of things that is hypothetically happening around them (Ni). Seeing a dent on the right side of a car, for instance, can be derived to mean that the car was hit turning left, meaning that the fault was probably the driver's judgement abilities of the car's relative speed coming straight and his window to turn left. Furthermore, it can then be derived that if the person is sensible, then he will most likely be much more cautious when turning left on intersections. Ni weaves a perception for that which has a physical manifestation,
explaining it, and explaining what that property will lead to. This is why Ni users are said to be able to grasp at patterns that others can't see (and why they are often denoted as natural strategists), because they are immersed in the immaterial, dynamic patterns that can give them an advantage of seeing what comes next. Thus, they are immersed in these patterns

Ni

, and piece those patterns together by physical details (static constants in the physical environment). This is

/

axis.
Reducing static concepts and hypothetical immediate possibilities down to a single general idea is the doing of Ne.
Reducing dynamic concepts and hypothetical circumstances down to a single general idea is the doing of Ni.
This is another reason why xNxJ's are described as being patient, as they can intuitively sense the changing of the winds in the patterns. They know what to wait for, and if they are confident enough, they can act on them easily and strike not with force but with finesse. An example of this would probably be two INTJ's plotting the others' demise, such as the story-line between Walter White and Gus Fring in Breaking Bad, as they both are able to realize the other's plans on an incredible level and avoid danger while simultaneously knowing when to strike.
Being able to guess dynamic turn of events and able to opportunize possibilities is what ENTPs and ENFPs do all the time. That's MBTI Ne's doing. Ask for feedback from ENxPs if you doubt me. That's how ENTPs get their inventor trait. That's how ENFPs seek out ways to entertain themselves.
It may look like dynamic turns of events, but unlike the INxJ casting their pattern sail, the ENxP's see the immediate potential of ideas, and instead of casting a sail, bring a boat with oars to paddle not where the patterns take them, but where they think they should go. This is why ENxP's always have a "let's" attitude toward ideas, as any kind of immediate potential to do something excites them. They want to act on anything with potential, and this is why they are entrepreneurs, they can see the relative worth of an idea as a constant, whereas the INxJ's can see the relative worth of an idea in the long run.
How can you claim that those type descriptions are wrong so easily and with so much confidence? Doesn't that undermine the credibility of the entire socionics system?
Because type descriptions are written by people, and people are terrible judges of character, and are apt at being wrong. The "Descriptions" are based on what the writer thinks a sociotype acts like, preferring to make assumptions about a sociotype's lifestyle instead of sticking to the mechanical model, explaining how they work and not how they probably work. For instance, an LSI description says that LSI's should be hard-working diligent individuals because of how

works (the need to be doing something). What they don't realize is that

is the motivation to do what the sociotype wants to do, so the sociotype might be rather lazy when dealing with tasks they don't want to do in real life, thus leading them to disbelieve they are an LSI because of that very line. Model A is the system, the descriptions are excess bullshit that can be interpreted to mean anything.
And how can you so easily write off several socionics type descriptions that doesn't fit with the j-p conversion?
I didn't write them off because they don't fit with the j-p conversion (which they can be interpreted to actually fit with j-p conversion, because type descriptions are ambiguous in specificity). I wrote them off because type descriptions in general, suck.
Is the model configuration built on type descriptions/categories or are type descriptions built on the model configuration? Which comes first?
Socionics is a construction of Ti, the type descriptions are a product of the Model and interviews with people who supposedly fit the model at the time Socionics was created.
*The silent angry types, when they are angry, they stop speaking, and immediately try to break something to demonstrate their anger in a creative (Se) fashion.