🄱🄴🅃🄰 🅀🅄🄰🄳🅁🄰 𝐓𝐡𝐞 𝐋𝐒𝐈 (𝐈𝐒𝐓𝐏) 𝐏𝐞𝐫𝐬𝐨𝐧𝐚𝐥𝐢𝐭𝐲 𝐓𝐲𝐩𝐞

"The intellectual goal of the LSI is to improve different systems and serve them, to keep them in exemplary order. The goal of these systems is to better manipulate objects. It was an LSI who gave birth to the idea that there are no irreplaceable people. Except for them. They are vigilant to ensure that no such indispensable people ever appear."

- Aushra

Opening Statements: Written by ImpossibleHunt 

The four-letter code ISTP is very hard to distinguish from Ti-Se, at least IMO. I would argue it's the same for lots of people coming from MBTI. Ti-Se is a very large part of what this type is, so I keep calling them ISTP, despite them being called ISTj in socionics. In my experience, if you say ISTJ, then people think of Si-Te. Which, well, is not this type at all. That's the main reason why I call the LSI ISTP, instead of ISTj. 

With that being said, the ISTP (LSI) is often type-casted into being the loner "badass soldier" type. That can be true in a few cases, but the vast majority of ISTPs are exceedingly rigid people, who desire to categorize everything into a single system (Ti), and then strive to enforce it (Se). But these types can be unexpectedley rebellious, and they will only adhere to a system if it makes sense. If it no longer does, they will continuosuly add onto it to create something entirely new. So be careful in typing people LSI if they do not display this rebellious tendency. If they submit their will to others even if it does not make sense, or does not create any new structures of their own (and only obeys their expected roles), they are likely not an LSI. 

In summary, these types do not discriminate, and are some of the most fair people you'll ever meet. But they can also be the most authoritarian and suspicious if not careful. 

Type Breakdown

Ti-Se Ego Block
(Ti-Se) - (Ni-Fe) - (Te-Si) - (Ne-Fi)

    The Ego Block is the aspect of the personality you are the most confident in, and is what you offer to the world. It's the main dish of the course, and it's your signature. As such, the ego block is made up of the Base/Leading the Creative functions. The base function is your entire worldview; everything stems from it. The creative function is the sword to your kit, which you can use in any given situation. It's flexible, and importantly, can be turned on and off (which makes it more subtle in usage than the base function), as it's not "on" 24/7. 

    For the LSI (ISTP), the base and creative functions are Ti and Se. 

    First and foremost, the LSI (ISTP) seeks a world that won't change, and remains structured in accordance to their own perceived view of how the world works. No matter what, the structure cannot fall apart. To do this, the LSI is always looking for ways to refine and improve upon their internal logical frameworks. Their personalities are dictated by their position in the system. This is also how they govern their relationships with their family, and broader society as a whole. They are intensely aware of what systems govern people, and will tailor themselves accordingly.

    For example, as described by Aushra, an LSI might come across a group of delinquents, and immediately recognize that these people do not play by the same systems he/she does. Whereas if the LSI is adhering to an education-system, where people are valued to people based on their education credentials, a well-educated LSI may regard those who have less education as "lower" in status. In essence, these are types that will obey pre-established systems, but then will disregard systems that become logically inconsistent as they proceed through life. They have a keen perception of what systems/structures are at work, and how they are enforced in society.

    Because of this, LSIs are always walking a tight-rope between obeying authorities, and rebelling against them when they feel their logical frameworks are superior, or that the former no longer cuts it. In order to make sure others are obeying the systems they have in place, the LSI will use Se creative to apply the proper amount of force to get the "violators" back into line. A trait they share with SLEs, LSIs are extremely consistent people, who do not discriminate based on interpersonal connections and relationships. Regardless whether you are someone who knows them well, or a stranger; the LSI will treat you the same. If you are acting logically consistent to their way of seeing the world, you are an ally. If not, you need to be corrected until you see the world the way they do. 

----------------------------------

    A good (albeit extreme) example of an LSI (ISTP) is Floch Forster from Attack on Titan. Once a loyal soldier to the Scout Regiment who joined because he believed in the cause, his loyalty was forever shattered when Eren, Mikasa, and Levi chose their personal sentiments over saving his commander (the most logical decision to do). Floch is amongst one of the few people to speak out and question the logical consistency of such a decision. He aggressively confronts the members of the Scouts about their decision. In his eyes, while all of his comrades (who died on the fields of Shiganshina) were prepared to selflessly dedicate their lives at the cost of Erwin's orders, the people in charge then let their personal sentiments get in the way of the group. The people in charge were selfish, and put themselves above the rest of humanity. It's easy to see why Floch felt betrayed by this decision, coming from his perspective. 




    This, combined with the fact that Floch was growing increasingly discontent with Regiment's handling of foreign threats, only exasperated his concerns, and deepened his resolve to change things from within.

    From that point on, Floch believed that the Scout Regiment was in need of a proper regime change, and he (and Eren as the figurehead once their interests became aligned) were the right people to get the job done. As soon as gained the reins of power and the opportunity presented itself, Floch instantly began getting to work, purging the Scouts of disloyal individuals, or those who would threaten his regime. These have included people Floch has known for years. To him, it does not matter. The safety and security of the Yeagerist movement is more important than any sole person. People who do not fall in line with him are now a threat. It shows that not only Floch follows structures, he is more than capable of developing his own systems and ideology to improve upon the old, and casting out the "details" that are no longer compatible.

 

    



    Of course, Floch is a really extreme example of how an LSI (ISTP) can become authoritarian under extreme circumstances. Their ego functions are built to keep everyone in line and loyal to a system, but LSIs demonstrate this in smaller, more... "chill" ways. This can be enforcing religious doctrine, politics, etc. But the underlying mechanisms that inspire LSIs to adopt, abandon, and create their own systems remain consistent across them. Having an example like Floch can help to clearly demonstrate it.

Fi-Ne Superego
(Ti-Se) - (Ni-Fe) - (Te-Si) - (Ne-Fi)

    If you are coming in from MBTI, this is where socionics begins to depart from it. The next area of focus is called the superego block, or the area in which uses to support their ego block. The two functions in this sphere are called the Role and the POLR (Point of Least Resistance) functions. 

    The Role element is the function you use to directly support, and to balance out your ego-block functions. It is not something you enjoy doing or value, but it needs to be done in order to balance yourself out as a person. You'll see this element a lot (which can lead to mistypings), and you can actually become quite profecient with this function with practice. The POLR function is the element you essentially keep locked up in your basement because it directly messes with the ego-block. As such, this is going to often be the function many struggles with using properly, and requires constant (and painful) trial-and-error to improve. 

    For the LSI, their role and POLR functions are Fi and Ne. 

    This means that LSIs do recognize the importance of personal sentiments, but will exclusively use them to bolster their Ti-Se, namely, their desire for structure and order. Fi role usually depicts morality in a rigid sense, clearly defining what "right" and "wrong" is. This usually has adhering to whatever system being the morally "correct" option, whereas people who exist outside of them are to be seen as "wrong," or the enemy. As a result, many people might mistype LSIs as actually being Fi base, because this moral "call to arms" seems indicative of someone who values those personal sentiments a great deal. 

    However, once you assess the LSI further, you'll realize that their need for structure/order, far exceeds their moral inclinations. They more-so fear what might happen to them and their sense of safety/security if their logical framework falls apart, they would lose their place in the world. They would be lost. So having a firm system that is unbending and morally rigid, gives the LSI peace of mind, at the cost of coming across as authoritarian and...well, morally rigid. 

    POLR Ne essentially means the LSI does not value looking at potential. They see it as irresponsible. Instead, it is far more reliable and realistic to see how things are right in front of them, and interpret the reality surrounding them as it is. As such, they require concrete, observable proof that their system is incorrect or inconsistent, rather than being able to assess potential alternatives in the ether. These types are very stubborn when it comes to changing their mind, and their sense of morality and structure is completely unyielding to external pressure. 

-------------------------------------

    A poignant example of this comes from Bruce Wayne/ Batman, and his sense of morality (namely his "no kill rule). When Batman says that he "refuses to kill," Is it because he is actually concerned for the criminals he hunts? No. Otherwise Batman wouldn't go around beating the tar out of anyone who refills their soda at a McDonalds without paying the refill fee. Instead, he fears what might happen to him if his internal framework is destroyed. His argument that he will become "no better than the criminals" is purely to support his need for order and consistency to cope with the world he lives in. 

    He feels that he might become morally corrupted if he goes against his principles/ideals. This is far different to Fi base (EII and/or ESI), who fully recognizes that one single action can be both "good" and "bad" depending on the context. A crime like killing to an ESI could be completely immoral in one circumstance, whereas in others it might be the righteous option. To an LSI, arguments that bring in personal sentiments and moral judgements are meant to simply be the "icing on the cake" to their structure. While they recognize it's important to add it, they care far more about living their lives in a consistent manner.

Fe-Ni Super-id
(Ti-Se) - (Ni-Fe) - (Te-Si) - (Ne-Fi)

    The Super-id block is made up of the two functions that the indivdiual is weaker at, but consistently values and wants to get better at. This block has two functions, the mobilizing and the suggestive element. The mobilizing function is something that gives the individual energy, and is an avenue they want to keep actively pursuing to become better. The Suggestive function is known the "inferior" function in MBTI, and is an aspect that the individual sucks at, needs lots of help and guidance with, but they are open to (and love people who can provide) feedback in this area.

    For the LSI, the suggestive and mobilizing functions are Fe and Ni.

    Simply, the LSI wants to be around people who make him feel comfortable and at home, but has extreme difficulty in creating these scenarios for him/herself. So they are going to seek out those traits in others. Fe suggestive tends to make LSIs a lot more jovial people than you otherwise might suspect them being, and they will gladly open up if given the chance to. Once the LSI has enough experiences through trial and error, they will slowly learn to replicate those enviornments for themselves and others. This is why the LSI dualizes with the EIE, who is an expert in creating those accepting spaces. 

    Ni mobilizing typically means an LSI is only going to have an "instinct" for time. They are aware time moves forward, but the future to them is uncertain, like a fog. So these types don't like having deadlines looming over their head, and will quickly act to confront it, rather than waiting and biding their time. This can be exceedingly impulsive at times, and both LSIs and ESIs have the reputation for being impulsive in the face of uncertainty as a result. A type that has Ni in their ego block (such as the EIE) can help calm the LSI down, and act proportuniately in anticipation to future events. But generally, Ni mobilizing means the more the LSI has to wait, the more anxious and aggressive they get. They will then prefer to solve their problems head-on, even at inopportune times. 

    Take Sgt. Doakes for example. Instead of recording Dexter and slowly gathering intel on him (and making his move when the time is right), he instead confronts him head-on because he only "suspects" Dexter is connected to some larger plot. He even outright admits he doesn't know for sure. But instead he feels compelled to take action right then and there to physically assault a percieved threat. It would have been better in hindsight to bide his time. 

 

"Surprise motherfucker"

Si-Te Id Block
(Ti-Se) - (Ni-Fe) - (Te-Si) - (Ne-Fi)

The Id Block is made up of functions the individual is very good at. but don't really care that much to talk about, or draw attention to. These two functions are called the Demonstrative and the Ignoring elements. 

The Demonstrative element is something that is constantly running in the background, and many people might associate you as having. When it flairs up, tt's extremely bold, noticable, and it's actually the most potent function alongside your base/ dominant function. Because of this, it can lead to a load of mistypes if not careful, as you might think someone's demonstrative element is their base. However, the demonstrative element is not that interesting to the individual. They know they are good at it, but they don't see much value in investing too much time into this element.

    The Ignoring function is pretty self-explanatory. It's potent, effective, and it can be used when you need to. But you would much rather spend your time and energy engaging with your ego block, so this is only used as "back-up" when the scenario calls for it. 

    For the LSI, the demonstrative and ignoring functions are going to be Si and Te.

    Demonstrative Si makes it so the LSI is very attuned to aesthetic comforts, and can evaluate how the physical enviornment surrounding him/her plays a direct role in their experiences. But while the demonstrative function is extremely potent (it is one of the first things you'll spot in a person), the LSI regards aesthetic comforts as a simple novelty to be indulged in. Unlike an Si base, such as an SEI or SLI, it is not their life's mission to be always comfortable. Instead, the demonstrative function will make sure things are clean, aesthetically pleasing, and comfortable in a highly noticeable cleaning frenzy when the mess gets too large to tolerate. 

    Te ignoring generally manifests as being effective in fact-checking their conclusions, but it takes a lesser priority than making sure new information is consistent and "makes sense" to them subjectively. Something does not need to be inherently factually correct to "make sense," so some types can into trouble. However, when needed, LSIs will generally make sure their conclusions are both logical to them and rational. It's just that one takes priority over the other. 

How to Spot an LSI in your daily life

• Someone who is intensely aware of the rules and expectations governing an enviornment, or "social role." They will then adhere to these roles, but only if they make sense to him. If not, he/she will discard them, or make alterations to make them more consistent. Once they have a structure in place, their attention will be to making sure everyone around them is adhering to their principles/ethics/ rules. 
• May come across as incredibly moralistic, and will use personal sentiments as reasons for you to agree with them, take up arms, etc. 
• Does not deal with possibilities. They will take a "I'll believe it when I see it" approach to new information. May be anxious about their own capabilities, and potential to become lesser if they don't follow through with their own rigid code.
• May come across as incredibly dry, but you might see them quickly lighten up in jovial circumstances.
• Will likely be impulsive, does not like to wait. The longer the deadline looms, the more anxious they get.
• May be a slight clean freak at times, aesthetic, wears decent clothing, and knows exactly what makes them comfortable. However, will likely not place that much importance on these tendencies. They are a novelty over something to take that seriously. 
  
  

The smoothest and most challenging relationships for LSIs

• Smoothest: Beta Quadra - EIE (ENFJ), IEI (INFJ), LSI (ISTP), SLE (ESTP)
• Challenging: Delta Quadra - IEE (ENFP), EII (INFP), SLE (ESTJ), SLI (ISTJ)

Most common mistypes

1. ESI (ISFP) - Fi Role might be mistaken for Fi base/ Ti role might look like Ti base

2. SLI (ISTJ) - Si demonstrative might look like Si base / Ti and Te ignoring

Most common enneagram and psychosophy combinations

Enneagram - SO6, SX6

Psychosophy - (SO6) LVEF, LFEV, LFVE (SX6) LFVE

-----------------------------

Recommended Other Sources to Check Out

(Please check out Ti-imbecile on YouTube for Premium Psychosophy Content)
https://www.youtube.com/@Ti-Imbecile

Recommended Small YouTube Socionics Channels:
Trey4L: https://www.youtube.com/@trey4l

Jung's Lab: https://www.youtube.com/@Jungslab1312
PorcupineJason: https://www.youtube.com/@PracticalSocionics

Socionics Sources:

Aushra's Writings: https://classicsocionics.wordpress.com/

Wikisocion: https://wikisocion.github.io/

Fictional LSI (ISTP) Characters

Floch Forster (SO6 LFVE)
Attack on Titan
"If Eren dies, Paradis will sink under a sea of blood. The entire world will take vengeance on us! Your parents, your siblings, your children, they'll all be slaughtered! Dedicate your hearts!"

Teddy Daniels (SX6 LFVE)
Shutter Island

" Which would be worse: to live as a monster, or to die as a good man?"

Dexter Morgan (SO6 LFVE)
Dexter
"Killing must serve a purpose. Otherwise, it's just plain murder."

Jon Kavanaugh (SX6 LFVE)
The Shield 
"What I do is stop cops from breaking the rules. I can't stop them if I can't stop myself." 

Big Boss/ Naked Snake (SO6 LFVE)
The Metal Gear Saga
"We have no nation, no philosophy, no ideology. We go where we're needed, fighting not for country, not for government, but for ourselves."

Lilly (SX6 LFVE)
Telltale's The Walking Dead
"Nothing lasts Clementine. Not friends, not love, not the place you call home. Never forget that, or they'll drag you down too."

Diavolo (SX6 LVFE)
Jojo's Bizarre Adventure
"I must crush my fear! Now is the time... I must overcome it right now! That is what it means to live!"

Joshua Graham "The Burned Man" (SO6 LFVE)
Fallout: New Vegas
"I don't enjoy killing, but when done righteously, it is a chore like any other."

Altair Ibn-La' Ahad (SX6 LFVE)
Assassin's Creed
"You told me all would be made clear when I no longer needed to ask. So I will not ask. I demand you tell me what binds these men!"

Bruce Wayne / Batman (SX6 LFVE)
DC Universe
"If you make yourself more than a man, if you devote yourself to an ideal, and if they can't stop you, then you become something else..."

Gendo Ikari (SX6 LFVE)
Neon Genesis Evangelion
"Burying memories is man's way of surviving. But there are some things a man should never forget."

Susan Pevensie (SO6 LVFE)
The Chronicles of Narnia
"You invaded Narnia. You have no more right leading than Miraz does."

Eren Kruger (SO6 LVFE)
Attack on Titan
"The sole truth of this world I've found is that there is no truth. Any one of us can become a God or a Devil. All it takes is for people to believe it."

Severus Snape (SO6 LFVE)
Harry Potter
"You can carry back my words to the others who whisper behind my back, and carry false tales of my treachery to the Dark Lord! Before I answer you, I say, let me ask a question in turn. Do you really think the Dark Lord has not asked me each and every single one of those questions? And do you really think that, had I not been able to give satisfactory answers, I would be sitting here talking to you?"

Ghost Dog (SO6 LVEF)
Ghost Dog: Way of the Samurai
"It is bad when one thing becomes two. One should not look for anything else in the Way of the Samurai. It is the same for anything else that is called a Way. If one understands things in this manner, he should be able to hear about all Ways and be more and more in accord with his own."

Sgt. Doakes (SX6 LFVE)

Dexter
"My buddies thought I was crazy for becoming a cop. I had skills, I could have written my own ticket! And lately... I thought they mighta been right. But this? Ha-ha! This makes it all worth it."

Enrico Pucci (SO6 LVFE)
Jojo's Bizarre Adventure
"In the name of God, I'll smite you."

Anton Chigurh (SX6 LFVE)
No Country for Old Men
"If the rule you followed brought you to this, of what use was the rule?"

Scar (SX6 LFVE)
Fullmetal Alchemist: Brotherhood
"Your only solace from my wrath will be damnation!"